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G1132F
High Precision CC/CV Primary-Side PWM Power Switch
ANALOG PWM IC
1.0 General Description
G1132F is a high performance offline PWM
Power switch for low power AC/DC charger and
adaptor applications up to 5W.It operates in
primary-side regulation. Consequently,
opto-coupler and TL431 could be eliminated.
Proprietary Constant Voltage (CV) and Constant
Current (CC) control is integrated as shown In
the Fig.1. In CC control,the current and output
power setting can be adjusted externally by the
sense resistor RS at CS pin. In CV control,
multi-mode operations are utilized to achieve
high performance and high efficiency.
In addition, good load regulation is achieved by
the built-in cable drop compensation. Device
operates in PFM in CC mode as well at large load
condition and it operates in PWM with frequency
reduction at light/medium load.
G1132F offers power on soft start control and
protection coverage with auto-recovery features
including Cycle-by-Cycle current limiting, VDD
OVP, VDD clamp and UVLO. Excellent EMI
performance is achieved with frequency jitter
technique.
Fig.1. Typical CC/CV Curve
Features
5% CV and CC Regulation at Universal
AC input
Primary-side Regulation Without TL431
and Opto-coupler
Built-in High-Voltage Power MOS
Programmable CV and CC Regulation
Adjustable Constant Current and Output
Power Setting
Built-in Secondary Constant Current
Control with Primary Side Feedback
Built-in Primary winding inductance
compensation
Programmable cable drop compensation
Built-in Leading Edge Blanking (LEB)
Power on Soft-start
Built-in adaptive current peak regulation
Cycle-by-Cycle Current Limiting
VDD Under Voltage Lockout with
Hysteresis (UVLO)
VDD OVP and VDD Clamp
Pb-free SOP-7
Applications
Cell Phone Charger
Digital Cameras Charger
LED Driver
Small Power Adaptor
Auxiliary Power for PC, TV etc.
Linear Regulator/RCC Replacement
G1132F is offered in SOP-7 package.
Global Semiconductor Co., LTD.
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G1132F
High Precision CC/CV Primary-Side PWM Power Switch
2.0 Products Information
2.1 Pin configuration
G1132F
Fig.2. G1132F Pin Configuration
Pin Name
VDD
COMP
INV
CS
DRAIN
GND
I/O Description
P Power Supply
I Loop Compensation for CV Stability
The Voltage feedback from auxiliary winding. Connected to
resistor divider from auxiliary winding reflecting output
I
voltage. PWM duty cycle is determined by EA output and
current sense signal at pin 4.
Current sense input. Connected to primary current sensing
I
resistor.
HV MOSFET Drain Pin. The Drain pin is connected to the
O
primary lead of the transformer
P Ground
2.2 Output Power Table
Product
G1132F
85~264VAC
Adapter1
5W
Notes:
1. Maximum practical continuous power in an Adapter design with sufficient drain pattern as a heat sink, at
50ambient. Higher output power is possible with extra added heat sink or air circulation to reduce
thermal resistance.
Rev. 1.0
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G1132F
High Precision CC/CV Primary-Side PWM Power Switch
3.0 Package Information
SOP7:
Symbol
A
A1
A2
b
c
D
E
E1
e
L
θ
Dimension in Millimeters
Min Max
1.350
1.750
0.050
0.250
1.250
1.650
0.310
0.510
0.100
0.250
4.700
5.150
3.800
4.000
5.800
6.200
1.270(BSC)
0.400
1.270
0° 8°
Dimensions in Inches
Min Max
0.053
0.069
0.002
0.010
0.049
0.065
0.012
0.020
0.004
0.010
0.185
0.203
0.150
0.157
0.228
0.244
0.050(BSC)
0.016
0.050
0° 8°
Data and specifications subject to change without notice.
This product has been designed and qualified for Industrial Level and Lead-Free.
Qualification Standards can be found on GS's Web site.
Global Semiconductor HEADQUARTERS:
Scotia Centre4th FloorP.O.Box 2804George TownGrand Cayman KY1-1112
Cayman
Visit us at www.globalsemi-group.com for sales contact information.
www.globalsemi-group.com
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