PWM IC. G5237F Datasheet

G5237F IC. Datasheet pdf. Equivalent

Part G5237F
Description DIGITAL PWM IC
Feature G5237F Digital Green-Mode Quasi-Resonant Primary-Side PWM Power Switch 1.0 General Description The .
Manufacture Global Semiconductor
Datasheet
Download G5237F Datasheet



G5237F
G5237F
Digital Green-Mode Quasi-Resonant
Primary-Side PWM Power Switch
1.0 General Description
The G5237F 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 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 G5237F removes
the need for secondary feedback circuit 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. GlobalSemi’s innovative
proprietary technology ensures that power
supplies built with the G5237F can achieve
both highest average active efficiency and
have fast dynamic load response in a
compact form factor in typical applications.
DIGITAL PWM IC
Features
Tight constant-voltage and constant-current
regulation across line and load range
Primary-side feedback eliminates
opto-isolators and simplifies design
Proprietary optimized 90 kHz maximum
PWM switching frequency with
quasi-resonant operation achieves best
size, efficiency and common mode noise
Adaptive Multi-mode PWM/PFM control
improves efficiency
No external loop compensation components
required
Complies with EPA 2.0 energy-efficiency
specifications with ample margin
Built-in single-point fault protection features:
output short-circuit protection, output
over-voltage protection, over-current
protection current-sense-resistor fault
protection and over temperature protection
No audible noise over entire operating range
Applications
Compact AC/DC adapter/chargers for media
tablets and smart phones
AC/DC adapters for consumer electronics
Global Semiconductor Co., LTD.
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G5237F
G5237F
Digital Green-Mode QR Primary-Side PWM Power Switch
2.0 Products Information
2.1 Pin configuration
Figure2.1: G5237F SeriesSOP7 Package)
Pin# Name
I/O
Description
1 VCC Power Input Power supply for control logic.
2 GND Ground Ground.
3 VSENSE Analog Input Auxiliary voltage sense (used for primary regulation).
4
ISENSE
Analog Input
Primary current sense. Used for cycle-by-cycle peak current
control and limit.
5/6 DRAIN
Output
HV MOSFET Drain Pin.The Drain pin is connected to the
primary lead of the transformer
7 NC
2.2 Marking Information
Part Number
G5237F
Marking Information
2.3 Series description
Part Number
Description
G5237F Cable Comp = 300mV5V application
Rev 1.0
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