PWM IC. G5176 Datasheet

G5176 IC. Datasheet pdf. Equivalent

Part G5176
Description DIGITAL PWM IC
Feature G5176 Low-Power Off-Line Digital Green-Mode PWM Controller DIGITAL PWM IC 1.0 General Description .
Manufacture Global Semiconductor
Datasheet
Download G5176 Datasheet



G5176
G5176
Low-Power Off-Line Digital Green-Mode PWM Controller
DIGITAL PWM IC
1.0 General Description
The G5176 is a high performance AC/DC
power supply controller which uses digital
control technology to build peak current
mode PWM flyback power supplies.The
device directly drives a power BJT and
operates in quasi-resonant mode to provide
high efficiency along with a number of key
built-in protection features while minimizing
the external component count, simplifying
EMI design and lowering the total bill of
material cost.
Global-Semi’s innovative proprietary
technology ensures that with low system
cost, power supplies built with the G5176
can achieve both highest average efficiency,
less than 30mW no-load power
consumption and fast dynamic load
response in a compact form factor.
The G5176 removes the need for secondary
feedback circuitry while achieving excellent
line and load regulation. It also eliminates
the need for loop compensation
components while maintaining stability over
all operating conditions. Pulse-by-pulse
waveform analysis allows for a loop
response that is much faster than traditional
solutions, resulting in improved dynamic
load response, for both one-time and
repetitive load transients. The built-in power
limit function enables optimized transformer
design in universal off-line applications and
allows for a wide input voltage range.
Features
Very tight constant voltage and constant
current regulation over entire operating range
No-load power consumption < 30mW at
230Vac with typical application circuit
5-star rating
Fast dynamic load response for both one-time
and repetitive load transients
Complies with EPA 2.0 energy-efficiency
specifications with ample margin
Intrinsically low common mode noise
Adaptive multi-mode PWM/PFM control
improves efficiency
Quasi-resonant operation for highest overall
efficiency
Direct drive of low-cost BJT switch
Dynamic base current control
No external compensation components
required
Primary-side feedback eliminates opto-
isolators and simplifies design
64kHZ PWM switching frequency
Ultra-low start-up current(1.7uA typical)
Built-in soft start
Built-in short circuit protection and output
overvoltage protection
Built-in current sense resistor short circuit
protection
No audible noise over entire operating range
Applications
Compact low power AC/DC
adapter/chargers for cell phones,
PDAs,digital still cameras
Linear AC/DC replacement
Global Semiconductor Co., LTD.
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G5176
G5176
Low-Power Off-Line Digital Green-Mode PWM Controller
2.0 Products Information
2.1 Pin configuration
Pin Configuration: G5176 Series ( SOT23-5 )
Pin Name
VDD
FB
CS
GND
DRV
I/O Description
P Power supply for control logic.
I
Analog Input Auxiliary voltage sense (used for
primary regulation).
Analog Input Primary current sense. Used for
I
cycle-by-cycle peak current control and limit.
P Ground.
O Base drive for BJT.
2.2 Marking Information
Part Number
G5176
Marking Information
GBXXX
2.3 Series description
Part Number
G5176-00
G5176-01
G5176-03
G5176-05
Description
Cable Comp = 0mV
Cable Comp = 150mV
Cable Comp = 300mV
Cable Comp = 450mV
Rev 1.0
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