PAM2846 Datasheet, PDF (2/14 Pages) Power Analog Micoelectronics – Integrated 6 String LED Boost Type Driver

Block Diagram
VIN
PAM2846
Integrated 6 String LED Boost Type Driver
Vcc-5V
Vcc-driver
ENA
VC
PWMD
LDO1
LDO2
ENABLE
UVLO
OTP
Bandgap
POR
PWM DIMMING
OVP
1.2V
1.2V
EA
SOFT START
1.6MHz
1MHz
500KHz
SLOPE
COMPENSATION
PWM
COMPATATOR
+
MAIN
CONTROL
Level Shift _Driver
LED Feedback LED1-6
CURRENT
LIMIT
CS AMP
I_set AMP
Iset
led short protect led short protect led short protect led short protect led short protect led short protect
OVP
Fsel
SW
PGND
LED1
LED2
LED3
LED4
LED5
LED6
GND
Power Analog Microelectronics,Inc
www.poweranalog.com
2
07/2008 Rev 1.2