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Data sheet, Electrical characteristics (continued) – Diodes AP3041 User Manual

Page 7

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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

=500

μA

2 V

FLAG Low Voltage Level

V

FLAG-L

I

FLAG

=500

μA

0.25

0.75 V

Thermal Shutdown Temperature

T

OTSD

160

ºC

Thermal Shutdown Hysteresis

T

HYS

20

ºC