CS51221 datasheet(5/12 Pages) CHERRY

5 / 12 page

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Overcurrent Protection

Overcurrent Threshold

ISET = 0.5V, Ramp ISENSE

0.475

0.500

0.525

ISENSE to GATE Delay

125

External Voltage Monitors

Overvoltage Threshold

OV increasing

1.9

2.0

2.1

Overvoltage Hysteresis

OV = 2.15V

10.0

12.5

15.0

µA

Current

Undervoltage Threshold

UV increasing

0.95

1.00

1.05

Undervoltage Hysteresis

125

Soft Start (SS)

Charge Current

SS = 2V

µA

Discharge Current

SS = 2V

µA

Charge Voltage

2.8

3.0

3.4

Discharge Voltage

0.25

0.3

0.35

Soft Start Clamp Offset

FF = 1.25V

1.15

1.25

1.35

Soft Start Fault Voltage

OV = 2.15V or LV = 0.85V

0.1

0.2

Blanking

Blanking Time

150

250

SS Blanking Disable

VFB < 1

2.8

3.0

3.3

Threshold

COMP Blanking Disable

VFB < 1, SS > 3V

2.8

3.0

3.3

Threshold

Thermal Shutdown

(Note 1)

125

150

180

˚C

Thermal Hysteresis

(Note 1)

˚C

Note 1: Guaranteed by design, not 100% tested in production.

Electrical Characteristics: -40˚C < TA < 85˚C; -40˚C < TJ < 125˚C; 3V < VC < 15V; 4.7V < VCC < 15V; Rt=12K, Ct=390pF

Unless otherwise stated.

CS51221 Datasheet(PDF) 5 Page - Cherry Semiconductor Corporation

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