Transcript AC05I_OpticalIsolation_CEL_finalx - Renesas e

Optocouplers for Isolation and Ambient
Light Sensors in MCU based systems
Jeremy Dietz / Van Tran
Opto Strategic Business Unit
California Eastern Laboratories Inc.
Class ID: AC05I
Renesas Electronics America Inc.
© 2012 Renesas Electronics America Inc. All rights reserved.
Jeremy Dietz / Van Tran
 Jeremy Dietz
Joined CEL in December, 2006 as the Opto Strategic Business Unit
Director covering Lasers, Detectors, Optocouplers, OCMOSFETs and
ALS sensors. Prior to joining CEL, Jeremy worked in Product
Marketing Management at Sharp Microelectronics of the Americas
where he was responsible for Isolation, Power Devices, Wireless
Communications, Sensors and Optical System Devices for over 8
years. Additional experience in manufacturers representation and
distribution. Jeremy holds a BSEE from the University of Wyoming.
 Van Tran
Joined CEL in January, 2007 as an Application Engineer in
Optocouplers, OCMOSFETs, and ALS sensors. Prior to joining CEL,
he served as an Application Engineer Manager for LedEngin on High
Brightness LED products. His experience includes Infrared
Application Engineer Manager and IRDT Product Engineer Manager
for OSRAM - Optosemiconductor. Mr. Tran holds a MSEE from
Santa Clara University and a BSEE from Cornell University.
2
© 2012 Renesas Electronics America Inc. All rights reserved.
Renesas Technology & Solution Portfolio
3
© 2012 Renesas Electronics America Inc. All rights reserved.
Agenda
 CEL Introduction
 Optocoupler
 What is an Optocoupler and why use one?
 Common questions regarding galvanic isolation
 Major characteristics
 Significant design considerations
 Modes of operation
 Methods of load resistance selection
 Lineup and applications
 Isolated gate driver lineup and applications
 Ambient light sensor lineup and its application examples
 Q&A
4
© 2012 Renesas Electronics America Inc. All rights reserved.
California Eastern Laboratories
Founded in 1959
~78 Employees
Majority Employee-Owned (Private)
Business Focus:
RF & Optical Devices
Technical Design-In
Global Fulfillment
ISO9001 Certified
Website: www.cel.com
Renesas Electronics
owns ~14% of CEL
5
© 2012 Renesas Electronics America Inc. All rights reserved.
CEL in the Renesas Eco-System
* Compound Semiconductors: Opto Isolation & Switching • Lasers & Detectors • RF Components & ICs
Exclusive partners since 1962 for the Americas
Compound
Semiconductors*
Americas
NEC - 34%
Hitachi - 31%
Mitsubishi
Electric- 25%
Others - 10%
NEC:NEC Corporation,
Hitachi: Hitachi, Ltd.,
Mitsubishi Electric: Mitsubishi Electric Corporation
6
© 2012 Renesas Electronics America Inc. All rights reserved.
All other
Semiconductors
What is an
Optocoupler?
PhotoTransistor
GaAs
LED
Structure
Package Styles by Isolation Rating
* Under Development
PS23xx
5KVr.m.s.
4 PIN LSOP
PS81xx
PS25xx
5KVr.m.s.
4-16 PIN DIP
PS83xx
3.75KVr.m.s
5KVr.m.s.
PS27xx
3.75KVr.m.s.
4 PIN SOP
PS85xx
5KVr.m.s.
PS28xx
PS93xx
5KVr.m.s.
PS29xx
2.5KVr.m.s.
4-16 PIN SSOP
PS88xx
2.5KVr.m.
4 PIN MINI FLAT
PS91xx
3.75KVr.m.s.
s.
.
5 PIN SOP (SOP5)
1.5-3.75
KVr.m.s.
.
6 PIN SDIP
PS94xx
5KVr.m.s.
8 PIN DIP
PS95xx
5KVr.m.s.
8 PIN SSOP (SOP8)
PS98xx
5 PIN SOP (SOP5)
2.5KVr.m.s.
*
6 PIN SDIP
7
16 PIN SSOP (SO16)
© 2012 Renesas Electronics America Inc. All rights reserved.
8 PIN DIP
8 PIN SSOP (S08)
PS99xx
PS26xx
7.5KVr.m.s.
8 PIN LSDIP
Why use Optocouplers?
 An optocoupler is a device that transfers
control or data signals from one electrical
circuit to another without physically
joining them with an electrical
connection.
 Reasons for doing this are:
 To isolate electrical systems which must
communicate but their grounds are at different
potentials and to remove ground loops, such as,
in SMPS application.
 To isolate low power input control circuits from
high power circuits such as motor
drive applications.
 To remove electrical noise from signals by
isolating it away from another part of the circuit.
 To safely isolate people from dangerous electrical
systems.
8
© 2012 Renesas Electronics America Inc. All rights reserved.
What are the Major Characteristics of Optocouplers?
Viso: Isolation Voltage
IF: LED Forward Current
Current to operate the LED
of optocoupler. It is mainly
controlled by series
Resistance (Rf).
Maximum Voltage applied
between input and output
side (AC Vr.m.s.).
It depends on PKG size and
structure.
VCEO: Collector Emitter Voltage
The maximum voltage applied to
the detector transistor. It must be
greater than the VCC.
CTR: Current Transfer Ratio
Current Transfer Ratio is the
ratio of the Collector Current
(Ic) to forward current (IF), or
CTR = IC / IF x 100 and is
expressed as a percentage.
9
© 2012 Renesas Electronics America Inc. All rights reserved.
Common Questions? Regarding Galvanic Isolation Devices
Isolation Voltage
1.5 KV r.m.s. to 7.5 KV r.m.s depending on the
packages
Typical operating temperature is from -50°C to
100°C. However, some newer devices have
extended temperature range to 110°C, 115°C, and
125°C
Creepage Distance
Operating Voltage
4 mm to 14.5 mm depending on the packages
0.0 V to 350.0 V depending on the devices
Package Type
Safety Standards
DIP, SOP, SSOP, LSOP, MFP, SDIP, LSDIP
UL, CSA,, DIN EN60747-5-2 (VDE0884 Part 2),
BSI,SEMKO, NEMKO,DEMKO, FIMKO, CQC
CTR (if applied)
CM (Common Mode Transient Immunity)
50 % to > 3000% depending on drive conditions
Minimum 15KV/us, 25KV/us, 50KV/us depending
on the devices
Data Rate (if applied)
DC up to 15 Mbps depending on the devices
10
Operating Temperature
© 2012 Renesas Electronics America Inc. All rights reserved.
Significant Design Considerations
 Current Transfer Ratio, CTR =
(Ic/IF)*100 @ Given forward current,
IF and Vce. The below curve shows
how CTR varies with forward Current
(IF) for a given Vce.
 CTR can vary greatly from part to
part for a given LED current. This is
caused by:
 Variability in LED, detector and
packaging.
 HFE (current gain) of the transistor.
 Parts are targeted with CTR range
based on sorting HFE and LED light
output then tested at production
time. This is called ranking. In
general, the CTR rank spreads out
over 2 to 3 contiguous ranks.
11
© 2012 Renesas Electronics America Inc. All rights reserved.
Two Modes of Operation On/Off Linear Switch Mode
or Sensing Mode for Transistor Output Couplers
Linear Output
Digital Output (ON and OFF)
Critical Parameters
Critical Parameters
Forward Current, IF through the
IRED at the input side, Vcc at the
output side, Load Resistance, RL,
and CTR. Typical RL is less than 500
Ohm to operate in the linear mode
(Vce > 0.3 V) depending on the Vcc
on the output side
For Best Methods & Practices:
AN3010
Design Guidelines for a Renesas / CEL
Optocoupler with Transistor Output
Download
12
© 2012 Renesas Electronics America Inc. All rights reserved.
Forward Current, IF, through the
IRED at the input side, Vcc at the
output side, Load resistance, RL
and the collector current, Ic.
Load Resistance Selection in Digital Mode
 Method #1
Regardless CTR rank by
selecting IF and Ic based
on the graph of collector
current vs. collectoremitter saturation voltage.
Typical RL is chosen such
that Ic * RL > Vcc.
13
© 2012 Renesas Electronics America Inc. All rights reserved.
 Method #2
Or using the minimum CTR
as a worst case for
calculation plus the
tolerance and temp.
compensation to calculate
the load resistance.
Phototransistor Optocoupler Product Lineup
Single (DC)
Darlington (DC)
PartNumber(s)
10kbps
20kbps
High VCEO
Safety Standards
110ºC
Darlington
PS2513-1 ✪
PS2514-1 ✪
PS2533/35-1 ✪
PS2561D-1 ✪
PS2561F-1 ✪
PS2502-1 ✪
Single (DC/AC)
PartNumber(s)
General
High CTR
Safety Standards
110ºC (115ºC*)
Darlington (DC/AC)
PS270xA-1 ✪ ✪
PS2711/15-1 ✪ ✪
General
High VCEO
PS2702 ✪
PS2733 ✪
Single (DC/AC)
PartNumber(s)
General High CTR
Flat Lead
Safety Standards
110ºC
PS280xC-1 ✪ ✪
PS2811/15 ✪ ✪
Single (DC/AC)
PartNumber(s)
Single (DC/AC)
Common Lead
Tr: Common Collector
PS2841-4A, 4B ✪
PS2845-4A ✪
Darlington (DC)
Darlington (DC/AC)
PartNumber(s)
General
High VCEO
PS2802 ✪
PS2833 ✪
Flat Leat
PS2933 ✪
Single (DC)
4 Pin DIP
Darlington (DC)
PS25XX Series
LEGEND
DC
Input ✪
4 Pin SOP
Single (DC/AC)
PS27XX Series
(5mm Creepage)
Darlington (DC)
PS23xx Series
AC
Input ✪
(8mm Creepage)
Single (DC/AC)
4, 12,16
Pin SSOP
PS28XX Series
PS29XX Series
14
© 2012 Renesas Electronics America Inc. All rights reserved.
PS2761B-1 ✪
PS2381-1*✪
PartNumber(s)
PS291x-1 ✪ ✪
PS2861B-1 ✪
Simplified Design Guide
2012
Application Based
Optocoupler Design Guide
Link
Link
Link
www.cel.com/Optocouplers
15
© 2012 Renesas Electronics America Inc. All rights reserved.
Switch Mode
Power Supply
Questions ?
•
•
•
•
•
•
What Isolation Voltage do you require?
SMT or Through Hole Package?
What Operating Temperature do you require?
What Current Transfer Ratio (CTR) do you require?
What are your creepage distance requirements?
What Safety Standards do you require? (UL, VDE,etc.)
Feedback Control Circuit & DC/DC Converter
16
Isolation Voltage
Package
Family
5KVr.m.s.
DIP 4
PS25xx
5KVr.m.s.
LSOP 4
PS2381
3.75KVr.m.s.
SOP 4
PS27xx
2.5KVr.m.s. isolation,
3.75KVr.m.s. for PS2861B
SSOP 4
PS28xx
2.5KVr.m.s.
Mini Flat 4
PS2911
© 2012 Renesas Electronics America Inc. All rights reserved.
Communication Line
Speed
Package
Family
1 Mb/s
Analog
DIP 8
PS8501
Factory
Automation
Questions ?
Remote I/O
Isolation Voltage
Package
Family
5KVr.m.s.
DIP 4
PS25xx
5KVr.m.s.
LSOP 4
PS2381
3.75KVr.m.s.
SOP 4
PS27xx
2.5KVr.m.s. isolation,
3.75KVr.m.s. forPS2861B
SSOP 4
PS28xx
•
•
•
•
•
•
•
What Isolation Voltage do you require?
What Transfer Speed do you require?
SMT or Through Hole Package?
How many channels do you need to isolate?
What Operating Temperature do you require?
What are your creepage distance requirements?
What Safety Standards do you require? (UL, VDE, etc.)
Programmable Logic Controller
Input/Output Isolation
IsolationVoltage
Package
Family
2.5KVr.m.s.
SSOP 4
PS2801C
2.5KVr.m.s.
SSOP 4
PS2805C
1.5KVr.m.s.
SSOP 12
PS2841-4x
3.75KVr.m.s.
SOP 4
PS2701A
5KVr.m.s.
SOP 4
PS2501A
Programmable Logic Controller
Communication Isolation
AC Servo
See motor drive and control application on next slide
17
© 2012 Renesas Electronics America Inc. All rights reserved.
Speed
Package
Family
1 Mb/s Analog
SOP 5
PS8101
1Mb/s Digital
SOP 5
SOP 8
PS9122
PS9822
10 Mb/s Digital
SOP 5
PS9117A
10Mb/s Digital
SOP 8
PS9817A
15 Mb/s Digital
SOP 5
SOP 5
SOP 8
PS9121
PS9123
PS9821
10Mb/s Digital
DIP 8
PS9587
Motor
Drive
Inverter Control Isolated Gate
Driving of MOSFETs and IGBTs
Io peak (A)
Package
Family
2.5
DIP 8
PS9905
0.6
SDIP 6
PS9307
2.5
SDIP 8
PS9305
2.5
DIP 8
PS9505
0.6
DIP 8
PS9506
2.5
SO16
PS9402
Questions ?
•
•
•
•
What Isolation Voltage do you require?
What Transfer Speed do you require?
SMT or Through Hole Package?
How many channels do you need to isolate?
(1,2or 4 per PKG.)
• What Operating Temperature do you require?
• What are your creepage distance requirements?
• What Safety Standards do you require?
(UL, VDE, etc.)
Power Supply Isolation
Isolation Voltage Package Family
3.75KVr.m.s.
SOP 4
PS27xx
2.5KVr.m.s. isolation,
3.75KVr.m.s. for
SOSP 4 PS28xx
PS2861B
Data Communication Isolation
Speed
Package
Family
10 Mb/s
Digital
SOP 5
PS9117A
10 Mb/s
Digital
SOP 8
PS9817A
Isolation Amplifier for
feedback control
Inverter Control Isolated Driving of IPMs
18
Speed
Package
Family
5 Mb/s Digital
SDIP 6
PS9309
1Mb/s Digital
SDIP 6
PS9303
1Mb/s Digital
SOP 5
PS9113
1Mb/s Digital
SDIP 6
PS9313
1Mb/s Digital
DIP 8
PS9513
© 2012 Renesas Electronics America Inc. All rights reserved.
Isolation
Voltage
Package
Family
5KVr.m.s.
SDIP 8
PS8551
5KVr.m.s.
SDIP 8
PS9551
Reference Tables 1-4
19
Root Part
Input
Output
Operating
Temperature
Range (°C)
VCEO
IF
Max Max
(V) (mA)
PS2561D*
DC
Standard
-55 to +110
80
Bold: Focus Devices
CTR
(%)
CTR Rank
Available
Comments
40
50-400
Yes
Low cost version of PS2561B, PS2501 and PS2501A,
High temp
PS2501
DC
Standard
-55 to +100
80
80
80-600
Yes
Standard
PS2501A
DC
Standard
-55 to +100
70
30
50-400
Yes
Low cost version of PS2501
PS2561B
DC
Standard
-55 to +110
80
40
50-400
Yes
High temp, 4mm inner creepage distance
PS2561F*
DC
Standard
-55 to +110
80
30
300-600
No
Low cost version of PS2501-1-K, High temp
Root Part
Input
Output
Operating
Temperature
Range (°C)
CTR (%)
CTR Rank
Available
Comments
PS2381*
DC
Standard
-40 to +115
50-450
Yes
Stretched package, high temp operation
Root Part
Input
Output
Operating
Temperature
Range (°C)
CTR (%)
CTR Rank
Available
Comments
PS2761B*
DC
Standard
-55 to +110
70
25
50-400
Yes
High temp, low cost version of PS2701 and PS2701A
PS2701
DC
Standard
-55 to +100
40
50
50-300
Yes
Standard
PS2701A
DC
Standard
-55 to +100
70
30
50-300
Yes
Low cost version of PS2701
Root Part
Input
Output
Operating
Temperature
Range (°C)
CTR (%)
CTR Rank
Available
Comments
PS2801C*
DC
Standard
-55 to +100
80
30
50-400
Yes
Low cost version of PS2801
PS2861B
DC
Standard
-55 to +110
70
50
50-400
No
High temp version of PS2801 and PS2801C
PS2801
DC
Standard
-55 to +100
80
50
80-600
Yes
Standard
PS2805C
AC
Standard
-55 to +100
80
±30
50-400
Yes
AC input
PS2841-4x
x=A
common
cathode
x=B
common
anode
Common
Collector
-40 to +100
70
20
100-400
No
Ultra SSOP, quad channel with 12 leads
VCEO
IF
Max Max
(V) (mA)
80
60
VCEO
IF
Max Max
(V) (mA)
VCEO
IF
Max Max
(V) (mA)
© 2012 Renesas Electronics America Inc. All rights reserved.
Reference Tables 5-6
20
Bold: Focus Devices
Root Part
Type
Speed
Operating
Temperature
Range (°C)
Package
PS8501*
High Speed / High
Function
1 Mbps
-55 to +100
8 pin DIP
PS9122*
High Speed / High
Function
1 Mbps
-40 to +100 5 pin SOP
PS9117A*
High Speed / High
Function
10 Mbps
-40 to +85
PS9821*
High Speed / High
Function
15 Mbps
-40 to +85
PS9324L/L2*
High Speed / High
Function
PS9123*
High Speed / High
Function
PS8101
High Speed / High Function
1 Mbps
-55 to +100
PS8821
High Speed / High Function
1 Mbps
-55 to +100
Isolation
VCC
CMR
Voltage
Max
KV/µS
(Vr.m.s.)
(V)
VCC
TYP
(V)
Comments
5K
-
35
-
8 mm creepage, 8 pin DIP
3.75K
±15
7
3.3 or
5
3.3V & 5V versions, Open Collector
5 pin SOP
3.75K
±15
7
5
5V, Low Distortion
SO8
2.5K
±15
7
3.3
3.3V, Low Distortion
15 Mbps -40 to +100 6 pin SOP
5K
±15
7
3.3 or
5
3.3V & 5V versions, Open Collector,
Low Distortion
15 Mbps -40 to +100 5 pin SOP
3.75K
±15
7
5
Totem Pole Output, Low Distortion
5 pin SOP
3.75K
±15
35
-
High CMR analog output
SO8
2.5K
±1
7
3.3 typ.
3.3V, Power Over Ethernet
3.3V & 5V versions, OC
PS9822
High Speed / High Function
1 Mbps
-40 to +100
SO8
2.5K
±20
7
3.3 or
5V
PS9121
High Speed / High Function
15 Mbps
-40 to +85
5 pin SOP
3.75K
±15
7
3.3
3.3V, Low Distortion
PS9817A
High Speed / High Function
10 Mbps
-40 to +85
SO8
2.5K
±15
7
5
5V, Low Distortion
PS9317
High Speed / High Function
10 Mbps
-40 to +85
6 pin SDIP
5K
±15
7
5
8 mm creepage, 6 pin SDIP
PS9587
High Speed / High Function
10 Mbps
-40 to +85
8 pin DIP
5K
±15
7
5
8 mm creepage, 8 pin DIP
PS9851
High Speed / High Function
15 Mbps
-40 to +100
SO8
2.5K
±10
5.5
5
5V, 100°C max operating temp
Root Part
Input
Output
Operating
Temperature
Range (°C)
VCEO Max
(V)
IF Max
(mA)
CTR
(%)
CTR Rank
Available
Comments
PS2911*
DC
Standard
-55 to +100
40
50
100-400
Yes
Ultra small flat-lead package
PS2705A
AC
Standard
-55 to +100
80
±30
50-300
Yes
AC input
© 2012 Renesas Electronics America Inc. All rights reserved.
Reference Tables 7-10
Operating
Isolation
tPLH / tPH
IF Max
Temperature Voltage
(µS)
(mA)
Range (°C) (Vr.m.s.)
CMR
KV/µS
VCC Max
(V)
Comments
25
±25
30
14mm Long creepage, 8 pin DIP
5K
25
±50
35
6 pin SDIP
-40 to +110
5K
25
±25
30
UVLO (Under Voltage Lock Out) protection with
hysteresis
0.2
-40 to +110
5KV
25
±25
33
Fault detection (desaturation detection, UVLO protection
and active Miller clamping)
DC
0.25
-40 to +110
5KV
25
±25
30
UVLO (Under Voltage Lock Out) protection with hysteresis
PS9506
DC
0.4
-40 to +110
5KV
25
±25
30
8mm creepage option available
Root Part
Input
CMR
KV/µS
VCC Max
(V)
Comments
PS9309*
DC
250/250
-40 to +110
5 Mbps Totem Pole output type, 6 pin SDIP, IPM driver
PS9303
DC
500/550
PS9113
DC
750/500
PS9313
DC
PS9513
DC
Root Part
Input
PS9905*
DC
0.25
-40 to +110
7.5K
PS9307*
DC
0.175
-40 to +125
PS9505*
DC
0.25
PS9402*
DC
PS9305
Operating
Isolation
tPLH / tPH
IF Max
Temperature Voltage
(nS)
(mA)
Range (°C) (Vr.m.s.)
5K
20
±15
20
-40 to +110
5K
20
±15
25
1 Mbps Totem Pole output type, 6 pin SDIP, IPM driver
-40 to +110
3.75K
25
±15
35
1 Mbps, open collector output, 5 pin SOP (SO5) IPM driver
750/500
-40 to +110
5K
25
±15
30
1 Mbps, open collector output, 8 mm creepage 6 pin SDIP IPM
driver
750/500
-40 to +100
5K
30
±15
35
1 Mbps, open collector output, 8 mm creepage 8 pin DIP IPM
driver
Root Part
Operating
Temperature
Range (°C)
Bandwidth
TYP (kHz)
Input
Supply pp1
Max (mA)
Input
Supply
DD1
Max
(mA)
PS8551*
-55 to +100
100
18
16
Operating
VCC
Root Part Temperature
Max
Range (°C)
PS9551
21
Bold: Focus Devices
-40 to +85
5.5
VCC Range
Recommended
4.5 to 5.5
Gain
Gain
Erro
v/v TYP
r
(%)
8
±3
CMR
KV/µS
Comments
±10
1 Mbps high CMR analog output isolation amplifier
Output
Output ENOB
Input
Clock
Supply
Supply DD1
(Bits
DD2
Frequecy
Max (mA) Max (mA) Min)
(MHz Typ)
18
© 2012 Renesas Electronics America Inc. All rights reserved.
15
10
10
Comments
High CMR digital ouptut isolation amplifier,
sigma-delta modulator
Isolating and Driving Power Transistors
There are 3 topologies used in isolating and driving Power
Transistors for motor controls or inverter applications.
AN3006
AN3007
AN3019
AN3019
Photocoupler Used to Drive IGBTs and
Featuring Built-in Protection Functions
WP4001
APPLICATION NOTE
R08AN0001EJ0100
Rev.1.00
Sep 26, 2011
Contents
1.
Introduction ........................................................................................................................................ 2
2.
Product overview ............................................................................................................................... 2
3.
Description of operations and functions ............................................................................................ 4
4.
5.
Sample design ................................................................................................................................... 7
PS9402 peripheral circuits .............................................................................................................. 16
6.
Specifying dead times ..................................................................................................................... 17
7.
Calculating the junction temperature............................................................................................... 18
8.
Summary ......................................................................................................................................... 19
Helpful Tools
R08AN0001EJ0100 Rev.1.00
Sep 26, 2011
22
© 2012 Renesas Electronics America Inc. All rights reserved.
Page 1 of 20
Topology #1:
Optocouplers + Pre-Driver circuit + IGBT or MOSFET
Advantages


23
Provides customers with flexible
solutions and freedom to select
components from several vendors.
Provides the ability to isolate and
drive high power inverters /
motors (Over 50KW).
© 2012 Renesas Electronics America Inc. All rights reserved.
Disadvantages

Requires engineering resources
for development.

Adds more design complexity in
order to minimize noise, switching
loss, and heat dissipation.
Topology #2:
Optocouplers used in IPM Module
Disadvantages
Advantages


24
Provides less component count and
compact designs.
Typical application is for low and
medium power (~100W to 30KW.)
© 2012 Renesas Electronics America Inc. All rights reserved.

Higher cost solution.

Reduces the number of available
suppliers for IPM modules
(Powerex, Infineon..etc ).
Topology #3:
Optocouplers with Gate Driver for Direct Drive of the MOSFET/IGBT
Advantages
25

Provides less components
and compact designs.

Ease of Use.

Typical application is for low and
medium power (Up to 30KW).

Several vendors to choose from.
© 2012 Renesas Electronics America Inc. All rights reserved.
Disadvantages

Not Available for high power
drive but it can be used with
Topology #1 for high power
(~200KW).
Motor Drive & Control
Communication
High Speed
Optocouplers
26
SDIP-6,8
Speed
Output
Vcc/VDD
1Mbps
Analog
35V
14mm
DIP-8
PS8501
PS8502
PS8302
SO-5
PS8101
3.3V
10Mbps
15Mbps
Isolation
AMP.
Digital
3.3V, 5V
Open
Collector
5V
PS9122
PS9317
PS9324
PS9587
PS9117A
PS9924
3.3V
PS9121
Totem Pole
5V
PS9123
CMOS
5V
Analog
5V
Digital
5V
PS8802-1
PS8802-2
PS8821-1
PS8821-2
PS9822-1
PS9822-2
PS9817A-1
PS9817A-2
PS9821-1
PS9821-2
PS9851-1
PS9851-2
PS8551
SO-16
PS9551
IPM drive
Digital
>20V
PS9313
PS9303
PS9309
IGBT drive
Bi-CMOS
35V,2.5A
PS9305
35V,2.0A
PS9308
35V,0.6A
PS9306
PS9307
© 2012 Renesas Electronics America Inc. All rights reserved.
PS9151
PS9351
SO-8
PS9513
PS9905
PS9505
PS9506
PS9113
PS9402
Dispelling the Myths

MYTH #1:
Optocouplers fail quickly.
 Myth buster:
– If AN3010 is used, no long term issues and Digital Couplers are still
an unknown commodity.

MYTH #2: Digital Coupler = Optcouplers in Isolation.
 Myth buster:
– Optocouplers offer up to 7.5KV, Digital couplers can only offer 5KV.

MYTH #3: Optocouplers require ADC and DAC while Digital
Couplers are Digital to Digital.
 Myth buster:
–

Many circuits require isolation from analog (DC or AC) input to digital
output (or digital to digital ) – Optocouplers are the most cost
effective solution for a wide range of operating voltages (0.0 V to
350 V)
Digital Couplers are as Robust against EMI
as Optocuplers.
MYTH #4:
 Myth buster:
– Digital Isolators are more susceptible to EMI since they utilize a RF
carrier whereas Optocouplers use infrared light
27
© 2012 Renesas Electronics America Inc. All rights reserved.
Helpful Tools
Product
Selection Guide
Application Based
Design Guide
Creepage Based
Selection Guide
Print / Online
Collateral
Web
Tools
SPICE Models
28
© 2012 Renesas Electronics America Inc. All rights reserved.
Application Notes
AN3010 Answers 90% of Questions!
Reference Design
Optocoupler Summary
 Optocouplers are still today’s most cost effective way to
provide essential isolation for your noise and level shifting
sensitive circuitry.
 Utilizing CEL’s comprehensive design assistance tools will
optimize your design for superior performance and
reliability.
 If you ever get stuck and need a helping hand, reach out to:
Van Tran, Staff Applications Engineer
(408) 919-2254 [email protected]
Jeremy Dietz, Opto SBU Director
(408) 919-2228 [email protected]
We’d be happy to help out
29
© 2012 Renesas Electronics America Inc. All rights reserved.
Optocoupler
Questions?
30
© 2012 Renesas Electronics America Inc. All rights reserved.
Ambient Light Sensor Section
31
© 2012 Renesas Electronics America Inc. All rights reserved.
Why use Ambient Light Sensors?
 Adjust the brightness level of luminance devices
corresponding to the surrounding ambient light levels.
Enhance viewability across multiple lighting conditions.
 Reduce power consumption and extend battery
life – Environmental conservation.
32
© 2012 Renesas Electronics America Inc. All rights reserved.
Applications of Ambient Light Sensors
LED Lighting
Cellular Phone
FPD TV, OLED-TV
Eco-System
Ambient Light Sensors
DVR
PC
Gaming
DSC
33
© 2012 Renesas Electronics America Inc. All rights reserved.
Lux Measurement of Typical Light Sources
Street Light
Office Desk Lighting
Lux: 750
Lux: 20
Candle
(1m distance)
Lux: 1
Overcast / Sunny Day
Overcast Day
Lux: 3000
34
© 2012 Renesas Electronics America Inc. All rights reserved.
Lux: 20,000
Direct Sunlight
Lux: 100,000
Different Light Source Characteristics
Note: Most light sources emit both visible and IR light. They may have similar visible brightness
measured in lux but different IR emissions.
35
© 2012 Renesas Electronics America Inc. All rights reserved.
Renesas Ambient Light Sensor Product Offerings
Application
Product
Part Number
Indoor ( up to 1K lux)
PH5502B2NA1-E4
✔
PH5503A2NA1*
✔
✔
PH5551A2NA1-E4
✔
✔
PH5553A2NA1**
✔
✔
Analog Output
Digital Output
(I2C)
Note: (*) up to 10K lux
(**) I2C-bus interface 1.8V support
36
Outdoor (up to 65k lux)
© 2012 Renesas Electronics America Inc. All rights reserved.
Package
Dimensions Units:mm
Features
37

Pkg. Type:
SON

Size:
2.55mm x 1.56mm

Thickness:
0.55mm

Pin Pitch:
0.5mm

Surface:
Mat Finish

Terminal:
SnBi Plating

Halogen-Free Compliant
© 2012 Renesas Electronics America Inc. All rights reserved.
Spectral Sensitivity Characteristics
Example: PH5551A2NA1-E4
Sensitivity variation
1.2
1
(normalized by fluorescent light)
Relative sensitivity
相対感度
0.8
0.6
fluorescent
蛍光灯
0.4
incandescent
白熱電球
0.2
White LED
LED
0
0.0
200
400
600
800
1000
1200
波長[ nm ]
0.0
0.5
0.5
1.0
1.0Ratio 1.5
Ratio
1.5
2.0
Wavelength [nm]
Designed to have peak sensitivity at
550nm (corresponds to human eye
sensitivity)
38
© 2012 Renesas Electronics America Inc. All rights reserved.
Sensitivity variation is less
than 20%
2.0
Features of PH5553A2NA1
Incandescent light
Fluorescent light
Light
spectrum
Front Panel
light is attenuated
due to low transmission rate
of the optical window
Fine control is required
at the low illuminance range
optical
window
The spectrum changes
when it goes through
the optical window.
Then, illuminance detected
on the sensor will be different,
depending on light sources.
Sensor
PH5553A
High resolution 0.1 lux/count
can detect the slightest
illuminance change.
39
Light spectrum differs
with light sources.
© 2012 Renesas Electronics America Inc. All rights reserved.
PH5553A
Spectral sensitivity adjustment (16 modes)
with visible and IR PD makes it possible
to cancel the light sources dependency,
regardless of optical window design.
ALS with Digital Output Enhanced Flexibility
when used in Combination with an MCU
Example: PH5551A2NA1-E4
Vbus
I2C Bus
Master
SDA
SCL
XXX
照度
sensor
Slave
address 3
センサ
Illuminance
照度
sensor 2
Illuminance
照度
sensor 1
Slave address 2
Slave address 1
センサ
MCU,
照度
Processor,
センサ
CPU
LED Driver
LCD Driver
センサ
Slave
Two ambient light sensors can be connected to a single MCU and their
uses can be allocated as required.
-> luminance in 2 places can be measured separately.
40
© 2012 Renesas Electronics America Inc. All rights reserved.
ALS with Digital Output Enhanced Flexibility
when used in Combination with an MCU
=Interrupt function=
Example: PH5551A2NA1-E4
Illuminance
INT ON
INT OFF
U
L
INT ON
Interrupt function outputs a signal to the
master device when the brightness
exceeds a preset threshold value (U
and L).
U: Upper threshold
L: Lower threshold
This eliminates the need for constant communication between the MCU
and the sensor.
->Reducing the processing load on the MCU.
41
© 2012 Renesas Electronics America Inc. All rights reserved.
ALS Summary
 Ambient Light Sensors are very useful devices that can
dramatically increase durability and viewability.
 In addition, with the proper selection of parts and adhering
to CEL’s design guidelines, battery life can be extended or
additional functionality can be added, providing enhanced
value to your customer.
 If you ever get stuck and need a helping hand, reach out to:
Van Tran, Staff Applications Engineer
(408) 919-2254 [email protected]
Jeremy Dietz, Opto SBU Director
(408) 919-2228 [email protected]
We’d be happy to help out
42
© 2012 Renesas Electronics America Inc. All rights reserved.
ALS
Questions?
43
© 2012 Renesas Electronics America Inc. All rights reserved.
Please Provide Your Feedback…
 Please utilize the ‘Guidebook’ application to leave feedback
or
 Ask me for the paper feedback form for you to use…
44
© 2012 Renesas Electronics America Inc. All rights reserved.
Renesas Electronics America Inc.
© 2012 Renesas Electronics America Inc. All rights reserved.