LED5000 datasheet(9/52 Pages) STMICROELECTRONICS

部件名	LED5000

功能描述	3 A monolithic step-down current source with dimming capability

PDF	52 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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9 / 52 page

LED5000

Electrical characteristics

Doc ID 023951 Rev 1

9/51

Dimming

VDIM

Dimming levels

Switching activity

VIN=5.5 V to 48 V

2.2

Switching activity

prevented

VIN=5.5 V to 48 V

0.5

Error amplifier

VOH

High level output

voltage

VFB = 0 V

VOL

Low level output

voltage

VFB = 400 mV

150

Io source

Source output current

VCOMP = 1.5 V; VFB = 0 V

μA

Io sink

Sink output current

VCOMP = 1.5 V; VFB = 0.4

μA

Source bias current

VFB = 250 mV

DC open loop gain

RL =

∞

(1)

Transconductance

ICOMP = TBD;

VCOMP = TBD

220

μS

Thermal shutdown

TSHDWN

Thermal shutdown

temperature

(1)

140

150

160

° C

THYS

Thermal shutdown

hysteresis

(1)

° C

Parameter guaranteed by design

Table 5.

Electrical characteristics (continued)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

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