Rev. 1.00

3

August 14, 2015

HT7963

Recommended Operating Range

Parameter

Value

Unit

VIN

9~30

V

CS, OVP and FB

≤30

V

DRV (Internal Voltage Clamped)

13

V

DIM and COMP

0~5.5

V

Dimming Frequency

DC to 1000

Hz

Dimming Duty Cycle

1 to 100

%

Operating Junction Temperature

≤125

°C

NotethatAbsoluteMaximumRatingsindicatelimitationsbeyondwhichdamagetothedevicemayoccur.

RecommendedOperatingRatingsindicateconditionsforwhichthedeviceisintendedtobefunctional,butdonot

guaranteespecifiedperformancelimits.

Electrical Characteristics

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Supply Voltage

Input Voltage

VIN

9

—

30

V

Operating Current

DIM=5V

—

2.5

3

mA

Standby Current

DIM=0V

—

500

650

μA

Shutdown Current

DIM=0V, over 50ms

—

35

50

μA

Dimming

DIM High Threshold

VIN=9V to 30V

—

—

2.4

V

DIM Low Threshold

VIN=9V to 30V

0.6

—

—

V

DIM Internal Pull Down Resistance

—

—

500

—

kΩ

Dimming Frequency

DIM pin

100

—

1000

Hz

Dimming Duty Cycle

DIM pin

0

—

100

%

Shutdown Mode Entry Period

DIM=0V (Figure1)

—

50

—

ms

Recovery Time from Shutdown Mode

DIM from "L" to "H" (Figure1)

—

30

—

ms

Boost Converter

Switching Frequency

—

175

200

225

kHz

Maximum Duty Cycle

—

—

95

97.5

%

VIN=24V

—

13

14.5

V

DRV Rise Time

C=0.5nF

—

40

—

ns

DRV Falling Time

C=0.5nF

—

20

—

ns

LEB Time of Current Sense

Lead-Edge Blanking

—

200

—

ns

Protections

Soft Start Slope

SS

—

200

—

mV/ms

—

1.938

—

V

—

-5.0

—

+5.0

%

Input Supply Turn ON Level

UVLO (on)

—

—

8.5

V

Input Supply Turn OFF Level

UVLO (off)

6

—

—

V

Output Short Circuit Threshold

OSP

0.05

0.1

—

V

Over Current Protection Threshold

OCP, V(CS)

—

0.5

0.65

V

LED Short Protection Threshold

LED Short, V(FB)

—

1.2

1.56

V

—

—

70

—

mV

Thermal Shutdown

OTP

—

150

—

°C