CS51221 Ver la hoja de datos (PDF) - Cherry semiconductor

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componentes Descripción

Fabricante

CS51221

Enhanced Voltage Mode PWM Controller

Cherry semiconductor 

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.

PARAMETER

s Overcurrent Protection

Overcurrent Threshold

ISENSE to GATE Delay

TEST CONDITIONS

ISET = 0.5V, Ramp ISENSE

MIN

0.475

50

TYP

0.500

90

MAX

0.525

125

UNIT

V

ns

s External Voltage Monitors

Overvoltage Threshold

Overvoltage Hysteresis

Current

Undervoltage Threshold

Undervoltage Hysteresis

OV increasing

OV = 2.15V

UV increasing

1.9

2.0

10.0

12.5

0.95

1.00

25

75

2.1

V

15.0

µA

1.05

V

125

mV

s Soft Start (SS)

Charge Current

Discharge Current

Charge Voltage

Discharge Voltage

Soft Start Clamp Offset

Soft Start Fault Voltage

SS = 2V

SS = 2V

FF = 1.25V

OV = 2.15V or LV = 0.85V

40

50

4

5

2.8

3.0

0.25

0.3

1.15

1.25

0.1

70

µA

7

µA

3.4

V

0.35

V

1.35

V

0.2

V

s Blanking

Blanking Time

SS Blanking Disable

Threshold

COMP Blanking Disable

Threshold

VFB < 1

VFB < 1, SS > 3V

50

150

2.8

3.0

2.8

3.0

250

ns

3.3

V

3.3

V

s Thermal Shutdown

Thermal Shutdown

Thermal Hysteresis

(Note 1)

(Note 1)

125

150

5

10

180

˚C

15

˚C

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

5

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