CS51021ED16 datasheet(3/9 Pages) CHERRY

Nome de Peças	CS51021ED16

Descrição Electrónicos	Enhanced Current Mode PWM Controller

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Fabricante Electrônico	CHERRY [Cherry Semiconductor Corporation]

Página de início	http://www.cherrycorp.com/

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PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Electrical Characteristics: -40°C < TA < 85°C, -40°C < TJ < 150°C, 3V < VC < 20V, 8.2V < VCC < 20V,

RT = 12kΩ, CT = 390pF, unless otherwise stated

s

Error Amplifier continued

COMP High Voltage

VFB = 2.3V

4.35

4.8

5

V

COMP Low Voltage

VFB = 2.7V

0.4

0.8

1.2

V

PS Ripple Rejection

FREQ = 120Hz (Note 1)

60

85

dB

SS Clamp, VCOMP

VSS=2.5V, VFB = 0V, ISET = 2V

2.4

2.5

2.6

V

ILIM(SET) Clamp

(Note 1)

0.95

1

1.15

V

s

Oscillator

Accuracy

RT = 12k, CT = 390pF

230

255

280

kHz

Voltage Stability

Delta Frequency 8.2V < VCC < 20V

2

3

%

Temperature Stability

TMIN < TA < TMAX (Note1)

8

%

Min Charge & Discharge Time

(Note1)

0.333

µs

Duty Cycle Accuracy

RT = 12k, CT = 390pF

70

77

83

%

Peak Voltage

(Note 1)

3

V

Valley Voltage

(Note 1)

1.5

V

Valley Clamp Voltage

10k Resistor to ground on RTCT

1.2

1.4

1.6

V

Discharge Current

0.8

1

1.2

mA

Discharge Current

TA=25°C (Note 1)

0.925

1

1.075

mA

s

Synchronization (CS51021/23)

Input Threshold

1.0

1.5

2.7

V

Output Pulsewidth

160

260

360

ns

Output High Voltage

ISYNC = 100µA

3.5

4.3

4.8

V

Input Resistance

(Note 1)

35

70

140

kΩ

Drive Delay

SYNC to GATE RESET

80

120

150

ns

Output Drive Current

1k Load

1.25

2

3.5

mA

s

SLEEP (CS51022/24)

SLEEP Input Threshold

Active High

1.0

1.5

2.7

V

SLEEP Input Current

VSLEEP = 4V

11

25

46

µA

ICC @ SLEEP

VCC ≤ 15V

50

100

µA

s

GATE Driver

HIGH Voltage

Measure VC-GATE, VC = 10V, 150mA Load

1.5

2.2

V

LOW Voltage

Measure GATE-PGnd, 150mA SINK

1.2

1.5

V

HIGH Voltage Clamp

VC = 20V, 1nF

11

13.5

16

V

LOW Voltage Clamp

Measured at 10mA Output Current

0.6

0.8

V

Peak Current

VC = 20V, 1nF (Note 1)

1

A

UVL Leakage

VC = 20V, measured at 0V

-1

-50

µA

RISE Time

Load = 1nF, 1V < GATE < 9V,

60

100

ns

VC = 20V, TA = 25˚C

FALL Time

Load = 1nF, 9V > GATE > 1V, VC = 20V

15

40

ns

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