L8532G-S08-R datasheet(7/8 Pages) UTC

Part #	L8532G-S08-R

Description	Constant On Time PWM Control

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Manufacturer	UTC [Unisonic Technologies]

Direct Link	http://www.utc-ic.com

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L8532

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

7 of 8

www.unisonic.com.tw

QW-R125-041..a



ELECTRICAL CHARACTERISTICS (Cont.)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ZERO CURRENT DETECTION

ZCD Arming Threshold

VZCD(ARM)

VZCD=Increasing

1.25

1.4

1.55

V

ZCD Triggering Threshold

VZCD(TRIG) VZCD=Decreasing

0.6

0.7

0.83

V

ZCD Hysteresis

VZCD(HYS)

500

700

900

mV

ZCD Bias Current

IZCD

VZCD= 5V

-2

+2

uA

Positive Clamp Voltage

VCL(POS)

IZCD=3mA

16

18

20

V

Negative Clamp Voltage

VCL(NEG)

IZCD=-2mA

-0.9

-0.7

-0.5

V

ZCD Propagation Delay

tZCD

VZCD=2V~0V ramp,

dV/dt=20V/us,

VZCD=VCD(TRIG) o VDRV= 90%

200

270

ns

Minimum ZCD Pulse Width

tSYNC

70

ns

Maximum Off Time in Absence

of ZCD Transition

tstart

Falling VDRV=10% to Rising,

DRV=90%

75

165

300

us

DRIVE

ROH

Isource=100mA

12

20

Drive Resistance

ROL

ISINK=100mA

6

13

Ω

Rise Time

trise

10%~90%

35

80

ns

Fall Time

tfall

90% to 10%

25

70

ns

Drive Low Voltage

Vout(start)

VCC=VCC(on)-200mV,

Isink=10mA

0.2

V

CURRENT SENSE

Current Sense Voltage

Threshold

VILIM

0.45

0.5

0.55

V

Leading Edge Blanking Duration

tLEB

VCS=2V, VDRV= 90%~10%

100

195

350

ns

Overcurrent Detection

Propagation Delay

tCS

dV/dt=10V/us,

VCS=VILIM to VDRV= 10%

40

100

170

ns

Current Sense Bias Current

ICS

VCS= 2 V

-1

1

uA

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