Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041
Oct. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
7
Electrical Characteristics (Continued)
V
CC
=12V, V
EN
=3.3V, T
A
=25ºC, unless otherwise specified.
Parameter Symbol Conditions Min Typ Max Unit
Current Limit Threshold Voltage V
CS
0.48 0.5 0.52 V
RT Voltage V
RT
1.20 1.25 1.30 V
Error Amplifier Voltage Gain G
V
680 V /V
Error Amplifier Transconductance G
S
500
μA /V
EN Pin Threshold Voltage
V
EH
2.5
V
V
EL
0.5
PWM Pin Threshold Voltage
V
IH
2.5
V
V
IL
0.5
OV Threshold V
OV
2.25 V
OV Hysteresis Current Source I
OV-HYS
10
μA
LED- Short to GND Detection Level V
FB_LOW
0.3 V
LED+ Short to LED-Detection Level V
FB_HIGH
1.25 V
LED+ Short to GND Detection Level V
OV_LOW
0.3 V
Diode Short Detection Level V
CS_HIGH
1.75 V
CT Current Source I
CT
5
μA
CT Threshold Voltage V
CT
2.6 V
Maximum Duty Cycle D
MAX
f=200kHz 80 90 %
Soft-start Current Source I
SS
16 22 28
μA
OUT Pin Rising Time t
RISE
C
OUT
=1nF 20
ns
OUT Pin Falling Time t
FALL
C
OUT
=1nF 20
OUT High Voltage Level (V
CC
-V
OUT
) V
OUT-H
I
OUT
=50mA 0.25 0.75
V
OUT Low Voltage Level (V
OUT
) V
OUT-L
I
OUT
=50mA 0.25 0.75
V
FAULT Pin Rising Time t
RISE
C
FAULT
=1nF 100
ns
FAULT Pin Falling Time t
FALL
C
FAULT
=1nF 100
FAULT High Voltage Level
(V
CC
-V
FAULT
)
V
FAULT_H
I
FAULT
=10mA 0.25 0.75
V
FAULT Low Voltage Level
V
FAULT_L
I
FAULT
=10mA 0.25 0.75
V
FAULT Minimum Pulse Width t
D
Oscillator
Frequency=200kHz
20
μs
FLAG High Voltage Level V
FLAG-H
I
FLAG
=500μA
2
V
FLAG Low Voltage Level V
FLAG-L
I
FLAG
=500μA
0.25 0.75
V
Thermal Shutdown Temperature T
OTSD
160 ºC
Thermal Shutdown Hysteresis T
HYS
20 ºC
