UC3846

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

5 of 9

www.unisonic.com.tw

QW-R103-061. C



ELECTRICAL CHARACTERISTICS(Cont.)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX UNIT

CURRENT SENSE AMPLIFIER SECTION

Amplifier Gain

2.5

2.75

3.0

V

Maximum Differential Input

1.1

1.2

V

Input Offset Voltage

5

25

mV

CMRR

60

83

dB

PSRR

60

84

dB

Input Bias Current

-2.5

-10

µA

Input Offset Current

0.08

1

µA

Input Common Mode Range

0

V

Delay to Outputs

200

500

ns

CURRENT LIMIT ADJUST SECTION

Current Limit Offset

(Note 3)

0.45

0.5

0.55

V

Input Bias Current

-10

-30

µA

SHUTDOWN TERMINAL SECTION

Threshold Voltage

250

350

550

mV

Input Voltage Range

0

V

Minimum Latching Current

(Note 6)

3.0

1.5

mA

Maximum Non-Latching

1.5

0.8

mA

Delay to Outputs

300

600

ns

OUTPUT SECTION

Collector-Emitter Voltage

40

V

Collector Leakage Current

200

µA

Output Low Level

0.1

0.4

V

0.4

2.1

V

Output High Level

13

13.5

V

12

13.2

V

Rise Time

50

300

ns

Fall Time

50

300

ns

UNDER-VOLTAGE LOCKOUT SECTION

Start-Up Threshold

7.7

8.0

V

Threshold Hysteresis

0.75

V

TOTAL STANDBY CURRENT

Supply Current

17

21

mA

Notes: 1. All voltages are with respect to Ground, Pin 13. Currents are positive into, negative out of the speficied

terminal.

2. These parameters are not 100% tested in production, although guaranteed over the recommended

operating conditions

4.

Amplifier gain defined as: G=

4

PIN

7

PIN

V

∆

V

∆

5. Applies to UTC UC3846 only due to polarity of outputs.

6. Current into Pin 1 guaranteed to latch circuit in shutdown state.

7. Current into Pin 1 guaranteed not to latch circuit in shutdown state.