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G5126 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc

Part # G5126
Description  High Efficiency, Constant Current, Boost DC/DC White-LEDs Drive
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Manufacturer  GMT [Global Mixed-mode Technology Inc]
Direct Link  http://www.gmt.com.tw
Logo GMT - Global Mixed-mode Technology Inc

G5126 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc

  G5126 Datasheet HTML 1Page - Global Mixed-mode Technology Inc  
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Ver: 0.7
Mar 01, 2013
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G5126
Global Mixed-mode Technology
High Efficiency, Constant Current, Boost DC/DC
White-LEDs Drive
Features
Operating Voltage:2.7V to 5.5V
High Operating Frequency:1MHz
High Output Voltage:28V
Shutdown Current:<1µA
Over-Voltage Protection
Digital Dimming Control
Built-in Cycle-by-Cycle Current-Limiting
Soft-Start Function
0.2V Low Reference Voltage
SOT-23-6 & TDFN2X2-8 Package
Applications
LED Module
Compact Back Light Module
Constant Current Source
General Description
The G5126 boost converter contains a 0.7
Ω internal
switch. The IC operates at constant frequency 1MHz,
allowing the use of tiny, low cost and low height in-
ductors and capacitors. The IC operates from a 2.7V
to 5.5V supply voltage. High inrush current at start-up
is eliminated using the soft-start function. Constant
frequency current mode PWM architecture results in
low, predictable output noise. The G5126 includes
cycle-by-cycle 850mA current limiting to maximum
inductor current and over-temperature protection cir-
cuit. The over-voltage protection will be enabled when
VOUT exceeds 28V. The current of LED is set by a
resistor connected between FB and GND. The G5126
is available in SOT-23-6 & TDFN2X2-8 package.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5126TB1U
5126x
-40°C to 85°C
SOT-23-6
G5126RC1U
5126
-40°C to 85°C
TDFN2X2-8
Note: TB: SOT-23-6
RC: TDFN2X2-8
1 : Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
G963
IN
EN
SOT-23-6
6
4
1
LX
2
3
GND
FB
G5126
OVP
5
IN
LX
EN
FB
GND
G5126
C
OUT
1µF
10µH
V
IN=2.7V to 5.5V
10
R1
C
IN
4.7µF
OVP
I=20mA
PWM Dimming
TDFN2X2-8
G5126
1
2
3
4
8
7
6
5
EN
Thermal
Pad
VCC
OVP
LX
NC
PGND
VSS
FB
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
G963
IN
EN
SOT-23-6
6
4
1
LX
2
3
GND
FB
G5126
OVP
5
IN
LX
EN
FB
GND
G5126
C
OUT
1µF
10µH
V
IN=2.7V to 5.5V
10
R1
C
IN
4.7µF
OVP
I=20mA
PWM Dimming
PWM Dimming
TDFN2X2-8
G5126
1
2
3
4
8
7
6
5
EN
Thermal
Pad
VCC
OVP
LX
NC
PGND
VSS
FB
1
2
3
4
8
7
6
5
EN
Thermal
Pad
VCC
OVP
LX
NC
PGND
VSS
FB
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.


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