CS5127 datasheet(2/24 Pages) CHERRY

2 / 24 page

Absolute Maximum Ratings

Lead Symbol

Lead Name

VMAX

VMIN

ISOURCE

ISINK

Operating Junction Temperature, TJ..................................................................................................................................... 150¡C

Storage Temperature Range, TS...................................................................................................................................-65 to 150¡C

ESD (Human Body Model).........................................................................................................................................................2kV

Lead Temperature Soldering: Reflow (SMD styles only).............................................60 sec. max above 183¡C, 230¡C peak

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Electrical Characteristics: 0¡C < TA < 70¡C; 0¡C < TJ < 125¡C; 9.4V < VIN < 20V; CT = 330 pF; RT = 27k½;

unless otherwise stated.

SYNC

Oscillator Synchronization Input

5.5V

-0.3V

5 mA

Oscillator Integrating Capacitor

5.5V

-0.3V

1mA

Oscillator Charge Current Resistor

5.5V

-0.3V

1mA

VFB1, VFB2

Voltage Feedback Inputs

5.5V

-0.3V

N/A

COMP1, COMP2

Error Amplifier Outputs

7.5V

-0.3V

2mA

50mA

VFFB1, VFFB2

PWM Ramp Inputs

5.5V

-0.3V

1mA

GATE1, GATE2

FET Gate Drive Outputs

20V

-0.3V DC,

200mA DC,

-2.0V for

1A peak

t < 50ns

(t < 100µs)

LGnd

Reference Ground and IC Substrate

25 mA

N/A

PGnd

Power Ground

1A Peak,

N/A

200mA DC

ENABLE

Channel 2 Enable

5.5V

-0.3V

1mA

N/A

VREF

Reference Voltage Output

5.5V

-0.3V

150mA

5mA

(short circuit)

VIN

Power Supply Input

20V

-0.3V

N/A

200mA DC,

1A peak

(t < 100µs)

s Reference Section

VREF Output Voltage

Room Temperature,

4.9

5.0

5.1

IVREF = 1mA, VIN = 12V

Line Regulation

Load Regulation

1 mA < IVREF < 10 mA

VREF Variation over Line, Load

4.85

5.15

and Temperature

Output Short Circuit Current

100

150

s Oscillator Section

Oscillator Frequency Variation

175

210

245

kHz

over Line and Temperature

Maximum Duty Cycle

Sync Threshold

0.8

1.6

2.4

Sync Bias Current

VSYNC = 2.4V

170

250

µA

VSYNC = 5.0V

430

750

Sync Propagation Delay

230

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