STLD40DPMR datasheet(5/14 Pages) STMICROELECTRONICS

Part #	STLD40DPMR

Description	White led power supply for large display backlight

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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5 / 14 page

STLD40D

Electrical characteristics

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3

Electrical characteristics

Table 3.

Electrical characteristics

(TJ=-40°C to 85°C, VI=3.6V, VEN=3V, CI=2.2µF, CO=4.7µF, L=4.7µH, RLED=8Ω VO=32V, Typ.

values @ 25°C, unless otherwise specified)

Note: 1 Guaranteed by design

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VI

Input voltage range

3.0

5.5

V

VO

Output voltage range

VI

37

V

IO

Regulated output current

VO = 36V (10 White Leds)

20

mA

ISD

Stand-by current

VEN = Low, VI = 3.6V, TJ = 25°C

13

µA

VEN = Low, VI = 3V to 4.2V

10

IQ

Quiescent current

VI = 3V to 4.2V, TJ = 25°C

0.4

0.8

mA

VI = 5.5V, TJ = 25°C

0.8

1.2

RDSON

Boost switch RDSON

VI = 5.5V, I = 100mA

0.4

Ω

VI = 4.2V, I = 100mA

0.4

VI = 3.0V, I = 100mA

0.5

BVDS Breakdown voltage

38

V

ILIM-ADJ

Maximum peak inductor limit

adjust range Note: 1

RSET = 12kΩ to 100kΩ

0.2

1

A

ILIM

Maximum peak inductor limit

when RSET = VI Note: 1

VI = 3V to 5.5V

0.75

1.1

A

VFB

Feedback voltage

VI = 3.6V

130

165

200

mV

Line FB

Line feedback voltage

VI = 3V to 5.5V

535

mV

TON_MAX Maximum ON Time

VI = 4.2V

5.5

µs

TOFF_MIN Minimum OFF Time

VI = 4.2V

250

ns

υ

Efficiency at VI = 3.0VDC Note: 1 IO = 20 mA, VO = 36VDC

75

%

Efficiency at VI = 5.5VDC Note: 1 IO = 20 mA, VO = 36VDC

80

OVP

Overvoltage protection

36

42

V

OVHYS

Overvoltage hysteresis

1.5

V

VEN

Enable input logic low

Disable Low VIL

0.3

V

Enable input logic high

Enable High VIH

1.2

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