G1135.pdf 데이터시트 (총 11 페이지) - 파일 다운로드 G1135 데이타시트 다운로드

No Preview Available !

G1135
High Precision CC/CV Primary-Side PWM Power Switch
ANALOG PWM IC
1. General Description
G1135 is a high performance offline PWM Power
switch for low power AC/DC charger and adaptor
application. 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.
G1135 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.
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 SOP7 & DIP7
Applications
Cell Phone Charger
Digital Cameras Charger
LED Driver
Small Power Adaptor
Auxiliary Power for PC, TV etc.
Linear Regulator/RCC Replacement
Fig.1. Typical CC/CV Curve
G1135 is offered in both SOP7 and DIP7
package.
Global Semiconductor Co., LTD.
1 of 11

No Preview Available !

G1135
High Precision CC/CV Primary-Side PWM Power Switch
2. Products Information
2.1 Pin configuration
(a) DIP7 Package
(b) SOP7 Package
Fig.2. G1135 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
G1135P
G1135F
Package
DIP7
SOP7
85~264VAC
Adapter1
12W
8W
85~264VAC
Open Frame
15W
10W
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. 2.0
2 of 11

No Preview Available !

G1135
High Precision CC/CV Primary-Side PWM Power Switch
2.3 Block diagram
Fig.3. G1135 Block Diagram
3. Absolute Maximum Ratings
Description
VDD Voltage
HV MOSFET Drain Voltage
VDD Zener Clamp Continuous Current
COMP Voltage
CS Input Voltage
INV Input Voltage
Max Operating Junction Temperature TJ
Min/Max Storage Temperature Tstg
Lead Temperature (Soldering, 10secs)
Package Dissipation Rating for DIP7 RθJA1 2
Package Dissipation Rating for SOP7 RθJA2 2
Absolute Maximum Ratings
-0.3 to VDD_clamp
-0.3 to BVdss
10 mA
-0.3 to 7V
-0.3 to 7V
-0.3 to 7V
150
-55 to 150
260
75/W
90/W
Notes:
1. Stress beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
Exposure to absolute maximum-rated conditions for extended periods may affect device reliability
2. Drain Pin Connected to 100mm2 PCB copper clad.
www.globalsemi-group.com
3 of 11

No Preview Available !

G1135
High Precision CC/CV Primary-Side PWM Power Switch
4. Electrical Characteristics
(TA = 25, VDD=16V, unless otherwise noted)
Symbol
Parameter
Test Conditions
Min Typ Max Unit
Supply Voltage
IVDD_ST
Standby current
IVDD_OP
Operation Current
UVLO_ON
UVLO_OFF
OVP
VDD_Clamp
VDD Under Voltage
Lockout Enter
VDD Under Voltage
Lockout Exit
Over voltage protection
voltage
Maximum VDD
operation voltage
Current Sense
TLEB
VTH_OC
ZSENSE_IN
T_SS
LEB time
Over current threshold
Input Impedance
Soft start time
VDD=13V
INV=2V,CS=0V,
VDD =20V
VDD falling
VDD rising
Ramp up VDD until
gate clock is off
IDD=10mA
3.5 20
0.9 1.5
8.0 9.0 10.0
16 18.5 21
25.7 28.0 28.7
32.0 33.5 36.0
uA
mA
V
V
V
V
500
970 1000 1030
100
10
ns
mV
mS
Frequency Section
Freq_Max1
System Nominal switch
frequency
Freq_startup
INV=0V,Comp=5V
55 60 65 KHz
22 KHz
f/Freq Frequency jitter range
+/-5 %
Error Amplifier Section
Vref_EA
Reference voltage for
EA
Gain
DC gain of the EA
ICOMP_Max
Max. Cable
compensation current
Power MOS Section
BVdss
MOSFET Drain-Source
Breakdown Voltage
Rdson
On Resistance
INV=2V,COMP=0V
1.97 2.00 2.03
60
42
V
dB
uA
650 V
4.0 Ω
Notes:
1. Freq_Max indicates IC internal maximum clock frequency. In system application, the maximum operation
frequency of 60KHz nominal occurs at maximum output power or the transition point from CV to CC.
Rev. 2.0
4 of 11

No Preview Available !

G1135
High Precision CC/CV Primary-Side PWM Power Switch
5. CHARACTERIZATION
www.globalsemi-group.com
5 of 11