L8532G-S08-R datasheet(6/8 Pages) UTC

6 / 8 page

L8532

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 8

www.unisonic.com.tw

QW-R125-041..a



ELECTRICAL CHARACTERISTICS

VMFP=2.4V, VControl= 4V, Ct=1nF, VCS=0V, VZCD=0V, CDRV=1nF, VCC=12V, unless otherwise specified (For typical

values, TJ=25°C. For min/max values, TJ=-40°C~125°C, unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

STARTUP AND SUPPLY CIRCUITS

Startup Voltage Threshold

VCC(on)

VCC Increasing

12.5

Minimum Operating Voltage

VCC(off)

VCC Decreasing

8.8

9.5

10.2

Supply Voltage Hysteresis

HUVLO

2.2

2.5

2.8

Startup Current Consumption

ICC(startup)

0V<VCC <VCC(on) -200 mV

No Load Switching Current

Consumption

ICC1

CDRV=Open, 70kHz Switching, VCS

=2V

1.4

1.7

Switching Current Consumption

ICC2

70kHz Switching, VCS=2V

2.1

2.6

Fault Condition Current

Consumption

ICC(fault)

No Switching, VMFP=0V

0.75

0.95

Overvoltage And Undervoltage Protection

Overvoltage Detect Threshold

VOVP/VREF VMFP= Increasing

105

106

108

Overvoltage Hysteresis

VOVP(HYS)

100

Overvoltage Detect Threshold

Propagation Delay

tOVP

VMFP=2~3V ramp, dV/dt=1V/us,

VMFP=VOVP to VDRV=10%

500

800

Undervoltage Detect Threshold

VUVP

VMFP=Decreasing

0.25

0.31

0.4

Undervoltage Detect Threshold

Propagation Delay

tUVP

VMFP=1~0V ramp, dV/dt=10V/us,

VMFP=VUVP to VDRV= 10%

100

200

300

ERROR AMPLIFIER

TJ=25°C

2.475

2.500

2.525

Voltage Reference

VRER

TJ=-40°C~125°C

2.460

2.500

2.540

Voltage Reference Line

Regulation

VREF(line)

VCC(on)+200mV<VCC<20V

-10

IEA(sink)

VMFP=2.6V

IEA(sink)OVP VMFP=1.08×VREF

Error Amplifier Current

Capability

IEA(source)

VMFP=0.5V

-110

-280

-350

VMFP=2.4~2.6V, TJ= 25°C

110

120

Transconductance

VMFP=2.4~2.6V, TJ= -40~125°C

110

135

Feedback Pin Internal

Pull−Down Resistor

RMFP

VMFP=VUVP to VREF

MΩ

Feedback Bias Current

IMFP

VMFP=2.5V

1.3

1.6

Control Bias Current

IControl

VMFP=0V

-1

Maximum Control Voltage

VEAH

IControl(pullup)=10uA, VMFP=VREF

5.5

Minimum Control Voltage to

Generate Drive Pulses

Ct(offset)

VControl=Decreasing until VDRV is low,

VCt= 0V

0.37

0.65

0.88

Control Voltage Range

VEA(DIFF)

VEAH-Ct(offset)

4.5

4.9

5.3

RAMP CONTROL

Ct Peak Voltage

VCt(MAX)

VCOMP=open

4.775

4.93

5.025

On Time Capacitor Charge

Current

Icharge

VCOMP=open,

VCt= 0V to VCt(MAX)

235

275

297

Ct Capacitor Discharge Duration tCt(discharge)

VCOMP=open,

VCt=VCt(MAX) -100~500mV

150

PWM Propagation Delay

tPWM

dV/dt=30V/us,

VCt=VControl-Ct(offset) to VDRV=10%

550

600

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