B3844A1P datasheet(2/10 Pages) ETC

Part #	B3844A1P

Description	Current Mode PWM Controller

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Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556

www.baylinear.com

B384X

Absolute Maximum Rating

Parameter

Symbol

Value

Unit

Supply Voltage

VCC

30

V

Output Current

IO

±1

A

Analog Input (pin 2,3)

V(ANA)

-0.3 to 6.3

V

Error Amp Output Sink Current

ISINK (E.A)

10

mA

Power Dissipation

PD

1

W

Storage Temperature Range

T

-65 to 150

°C

Lead Temperature (Soldering 10 Sec.)

TL

260

°C

Electrical Characteristics

(VCC = 15V;RT = 10Ω, CT = 3.3nF, TA=0 °C to +70°C, unless otherwise specified)

Parameter

Symbol

Conditions

MIN

TYP

MAX

UNIT

REFERENCE SECTION

Reference Voltage

VREF

TJ = 25 °C. IREF= 1mA

4.90

5.00

5.10

V

Line Regulation

REG (line)

12V

≤VCC≤25V

-

6

20

Load Regulation

REG

(LOAD)

1mA

≤IREF≤20mA

T= 25

°C

-

6

25

mA

Short Circuit Output

Current

ISC

T= 25

°C

-

-100

-180

mA

OSCILLATOR SECTION

Oscillator Frequency

f

T= 25

°C

47

52

57

KHz

Frequency Change with

Voltage

∆f/∆VCC

12V

≤VCC≤25V

-

0.05

1

%

Oscillator Amplitude

VOSC

-

1.6

-

VP-P

ERROR AMPLIFIER SECTION

Input Bias Current

IBIAS

-

-0.1

-2

µA

Input Voltage

VI(E>A)

V1 =2.5V

2.42

2.50

2.58

V

Open Loop Voltage Gain

GVO

2V

≤VO≤4V

65

90

-

dB

Power Supply Rejection

Ratio

PSRR

12V

≤VCC≤25V

60

70

-

dB

Output Sink Current

ISINK

V2 =2.7V, V1 =1.1V

2

7

-

mA

Output Source Current

ISOURCE

V2=2.3, V1=5V

-0.6

-1.0

-

mA

High Output Voltage

VOH

V2=2.3, RL= 15Ω to GND

5

6

-

V

Low Output Voltage

VOL

V2=2.7, RL= 15Ω to pin 8

-

0.8

1.1

V

OUTPUT SECTION

ISINK = 20mA

Low Output Voltage

VOL

ISINK = 200mA

-

0.08

1.4

0.4

2.2

V

Source = 20mA

High Output Voltage

VOH

Source = 200mA

13

12

13.5

13.0

-

V

Rise Time

tR

TJ = 25 °C, CL=1nF (note3)

-

45

150

ns

Fall Time

tF

TJ = 25 °C, CL=1nF (note3)

-

35

150

ns

Note: Output Switch tests are performed under pulsed conditions to minimize power dissipation

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