PWM IC. G1555 Datasheet

G1555 IC. Datasheet pdf. Equivalent

Part G1555
Description ANALOG PWM IC
Feature G1555 High Performance Current Mode PWM Switch ANALOG PWM IC 1.0 General Description The G1555 is.
Manufacture Global Semiconductor
Download G1555 Datasheet

High Performance Current Mode PWM Switch
1.0 General Description
The G1555 is a high performance AC/DC power
supply Switch for battery charger and adapter
applications requirements up to 28W in an open
frame design.It can meet less than 80 mW
standby power.
G1555 is a current mode PWM Switch with a high
voltage power MOSFET. It operates in fixed
frequency which is precisely set internally. It
could operate in Extended Burst Mode at no load
or light load, in which mode switching loss is
minimized and the frequency is adjusted
internally. To ensure that power supplies work
quietly, the frequency is set beyond 20 KHz.
Small current is needed when G1555 starts up
and works, thus a large value resistor could be
used in the startup circuit to minimize the standby
power. Slope compensation circuit is integrated
in G1555, which improves system large signal
stability and reduces the possible sub-harmonic
oscillation at high PWM duty cycle.
Frequency shuffling technique is integrated in
G1555, which helps to achieve excellent EMI
G1555 offers complete protection functions
including cycle-by-cycle current limiting
protection(OCP), over load protection(OLP),VDD
over voltage protection(OVP), VDD over voltage
clamp and under voltage lockout(UVLO).
The G1555 is available in DIP8 package.
Built-in Soft Start
Random Frequency Adjustment to
Reduce System EMI
Audio Noise Free Operation
Internal Cable Compensation
Extended Burst Mode Control For
Improved Efficiency and Minimum
Standby Power Design
Internal Synchronized Slope
Low VDD Startup Current and Low
Operating Current
Leading Edge Blanking on Current
Sense Input
Over Load Protection(OLP) and
Cycle-by-Cycle Current Limiting
Over Voltage Protection (OVP),
Under Voltage Lockout Protection
(UVLO) and Over Voltage Clamp
Offline AC/DC flyback converter
Power Adapter
Set-Top Box Power Supplies
Open-frame SMPS
Auxiliary Power Supply for PC and
Digital Cameras and Camcorder
Global Semiconductor Co., LTD.
1 of 3

High Performance Current Mode PWM Switch
2.0 Products Information
2.1 Pin configuration
Pin Configuration: G1555 Series
Pin Name
I/O Description
P Power Supply
- Unconnected Pin
I Feed Back Input Pin
I Current Sense Input Pin
O HV MOSFET Drain Pin. The Drain pin is
connected to the primary lead of the transformer.
P Ground
Rev. 1.0
2 of 3

@ 2014 :: :: Semiconductors datasheet search & download site (Privacy Policy & Contact)