G5997 Datasheet, PDF (1/2 Pages) Global Mixed-mode Technology Inc – Step-up Controller for 12 Strings 60mA White LED Driver

Global Mixed-mode Technology
G5997
Step-up Controller for 12 Strings 60mA White LED Driver
Features
„ 5V~30V input voltage range
„ High Power Current Mode DC/DC boost
Controller
„ Drives up to 12 strings in parallel
„ 100Hz~2KHz PWM or DC Input True PWM Dim-
ming
„ 2.5% Current Matching Accuracy Between
Strings
„ Programmable Switching Frequency
„ Programmable Slope Compensation
„ Input Under Voltage Protection
„ Output Short Circuit Protection
„ Hiccup Mode Protection for Output Over Voltage
Protection and LED String Short Protection
„ Thermal Shutdown
„ Available in SOP-28, TSSOP-28 (FD) and
TQFN5X5-28 Package
Applications
„ Desktop LCD Flat Pannel Displays
„ Flat Pannel Video Displays
„ LCD TVs and Monitors
General Description
The G5997 is current mode DC/DC controller that
drives up to 12 strings connected in parallel configura-
tion with multiple LEDs in each string connected in se-
ries. External current sense resistor and slope com-
pensation resistor make it flexible for various applica-
tions. PWM dimming is implemented with external
PWM input signal or DC input signal. The dimming fre-
quency can be programmed by an external setting ca-
pacitor.
The G5997 includes hiccup protection from short cir-
cuits, with automatic recovery after the fault condition is
cleared.
The G5997 is available in a SOP-28, TSSOP-28 (FD)
and TQFN5X5-28 package.
Ordering Information
ORDER
NUMBER
MARKING
G5997P61U
G5997
G5997F41U
G5997
G5997R61U
5997
Note: P6:SOP-28 F4:TSSOP-28 (FD) R6:TQFN 5X5-28
1 : Bonding Code
U : Tape & Reel
Pin Configuration
TEMP.
RANGE
-20°C to +85°C
-20°C to +85°C
-20°C to +85°C
PACKAGE
(Green)
SOP-28
TSSOP-28 (FD)
TQFN 5X5-28
LGND 1
VIN 2
VDD 3
COMP 4
EN 5
DBRT 6
GND 7
RT 8
ISET 9
BOSC 10
LED12 11
LED11 12
LED10 13
LED9 14
G5997
SOP-28
28 LGND
27 VFAULT
26 GATE
25 PGND
24 CS
23 OVP
22 LED1
21 LED2
20 LED3
19 LED4
18 LED5
17 LED6
16 LED7
15 LED8
NC 1
VIN 2
VDD 3
COMP 4
EN 5
DBRT 6
GND 7
RT 8
ISET 9
BOSC 10
LED12 11
LED11 12
LED10 13
LED9 14
G5997
Thermal
Pad
28 NC
27 VFAULT
26 GATE
25 PGND
24 CS
23 OVP
22 _LED1
21 _LED2
20 LED3
19 LED4
18 LED5
17 LED6
16 LED7
15 LED8
NC 1
VIN 2
VDD 3
COMP ⁴
EN 5
DBRT 6
GND 7
Thermal
Pad
21 LED2
20 LED3
19 _LED4
18 LED5
17 LED6
16 _LED7
15 _LED8
TSSOP-28 (FD)
G5997 TQFN5X5-28
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
Ver: 0.5
May 30, 2012
TEL: [phone]
http://www.gmt.com.tw
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