PWM Controller. G5177 Datasheet

G5177 Controller. Datasheet pdf. Equivalent

Part G5177
Description Digital Green-Mode PWM Controller
Feature G5177 Low-Power Off-Line Digital Green-Mode PWM Controller DIGITAL PWM IC 1. General Description .
Manufacture Global Semiconductor
Datasheet
Download G5177 Datasheet



G5177
G5177
Low-Power Off-Line Digital Green-Mode PWM Controller
DIGITAL PWM IC
1. General Description
The G5177 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. The device together with an
external active device (depletion mode NFET or
NPN BJT) provides a fast start-up without
compromising no-load power loss.
Global Semiconductor’s innovative proprietary
technology ensures that power supplies built with
the G5177 can achieve both highest average
efficiency and less than 20mW no-load power
consumption, and have fast dynamic load
response in a compact form factor. The active
start-up scheme enables shortest possible
start-up time without sacrificing no-load power
loss.
The G5177 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.
Features
Very tight constant voltage and constant
current regulation over entire operating
range
No-load power consumption < 20mW at
230Vac with typical application circuit
Fast dynamic load response for both
one-time and repetitive load transients
Optimized 72 kHz maximum PWM
switching frequency achieves best size
and efficiency
Primary-side feedback eliminates
opto-isolators and simplifies design
Low supply current during normal
operationtypically 0.4mA without load
Good EMI design.
Complies with EPA 2.0 energy-efficiency
specifications with ample margin
Intrinsically low common mode noise
Active start-up scheme enables fastest
possible start-up
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
Built-in soft start, SCP, OVP
Applications
Cell Phone Charger
Digital Still Cameras Charger
Smaller Power Adaptor
Linear Regulator/RCC Replacement
Global Semiconductor Co., LTD.
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G5177
G5177
Low-Power Off-Line Digital Green-Mode PWM Controller
2. Products Information
2.1 Pin configuration
VDD
FB
ASU
DRV
GND
CS
Pin Configuration: G5177 Series ( Sot23-6 )
Pin Name
VDD
FB
ASU
CS
GND
DRV
I/O Description
P Power supply for control logic.
I
Analog Input Auxiliary voltage sense (used for
primary regulation).
Control signal for active start-up device (BJT or
O
depletion NFET).
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 Series description
Part Number
G5177-00
G5177-01
G5177-03
G5177-05
Description
Cable Comp = 0mV
Cable Comp = 150mV
Cable Comp = 300mV
Cable Comp = 450mV
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Rev. X.0





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