CM3842 查看數據表（PDF） - Unspecified

零件编号

产品描述 (功能)

生产厂家

CM3842

CURRENT MODE PWM CONTROLLER

Unspecified 

CM3842/3843

CURRENT MODE PWM CONTROLLER

RECOMMENDED OPERATING CONDITIONS

Parameter

Supply Voltage

Input Voltage

Output Voltage

Supply Current

Average Output Current

Reference Output Current

Timing Capacitor

Oscillator Frequency

Operating Free-air Temperature

Symbol

VCC / VC

VI,RT/CT

VI,ISENSE/VFB

VO, Output

ICC

IO

IO(REF)

CT

fOSC

TA

Recommended Operating

Min.

Typ.

Max.

30

0

5.5

0

30

25

200

-20

1

100

500

0

70

Units

V

V

V

mA

mA

mA

nF

KHz

OC

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, these specifications apply over the operating ambient temperature for CM384X with 0OC ≤

TA ≤70 OC; VCC = 15V(note 7); RT = 10K;CT = 3.3nF. Low duty cycle pulse testing techniques are used which

maintains junction and case temperatures equal to the ambient temperature.

Parameter

Symbol

Test Conditions

CM384X

Units

Min. Typ. Max.

Reference Section

Reference output Voltage

Line Regulation

Load Regulation

Short Ciruit Output Current

Oscillator Section

Oscillation Frequency

Frequency Change with Voltage

Frequency Change with Temperature

(note 8)

VREF

ISC

TJ = 25 OC, IREF = 1mA

12V ≤ VCC ≤ 25V,TJ = 25 OC

1mA ≤ IREF ≤ 20mA

TJ = 25 OC

f TJ = 25 OC

12V ≤ VCC ≤ 25V

TMIN ≤ TA ≤ TMAX

Peak-to-peak Amplitude At RT/CT

VOSC

Current Sense Section

Gain (note 9 & 10)

Maximum Input Signal (note 9)

Power Supply Rejection Ratio (note 9)

Input Bias Current

AVOL

VI(MAX)

PSRR

IBIAS

COMP = 5V

12V ≤ VCC ≤ 25V (note 9)

4.9 5.0 5.1

V

6

20 mV

6

25 mV

-30 -100 -180 mA

47 52 57 KHz

0.2 1.0 %

5

%

1.7

V

2.85 3.00 3.15 V/V

0.9 1.0 1.1

V

70

dB

-3.0 -10 µA

2001/06/27 Advanced

Champion Microelectronic Corporation

Page 4

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