80V 0.5A Switching Current Buck PFM LED Constant Current Driver

Rev 1.2

4

Note1:

Stresses greater than those listed under Maximum Ratings may cause permanent damage

to the device. This is a stress rating only and functional operation of the device at these or any

other conditions above those indicated in the operation is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect reliability.

Electrical Characteristics

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VCSP

CSP

Voltage

VIN = 24V to 80V,

Iled=0.3A, Pout=8W

190

200

210

mV

Efficiency

ŋ

VIN=48V, Iled=0.3A, Pout=8W

-

94.78

-

%

Efficiency

ŋ

VIN=60V, Iled=0.3A, Pout=8W

-

93.99

-

%

Efficiency

ŋ

VIN=72V, Iled=0.3A, Pout=8W

-

92.55

-

%

Electrical Characteristics (DC Parameters)

Parameters

Symbol

Test Condition

Min.

Typ.

Max.

Unit

Input operation voltage

VIN

24

80

V

Switching Frequency

Fosc

Figure4 (8*1W)

VIN=48V

53.8

67.2

80.6 KHz

Switching Frequency

Fosc

Figure4 (8*1W)

VIN=60V

64.2

80.2

96.2 KHz

Switching Frequency

Fosc

Figure4 (8*1W)

VIN=72V

70.0

87.4 104.8 KHz

Output LED open voltage

Vopen

Figure4 VIN=72V

36

V

DMOS

Drain-Source

Breakdown Voltage

90

V

DMOS

Drain-Source on resistor

0.1

0.15 Ohm

Thermal Shutdown

OTP

Tj

165

Thermal Shutdown Window

25

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