© 2014 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN8831

• Rev. 1.0

6

Electrical Characteristics

specified.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

Step-Up Switch Section

N-Channel On Resistance

0.2

0.5

Ω

LX Leakage Current

1.0

µA

Oscillator Section

Operating Frequency

Ω

40

50

60

KHz

Ω

20

25

30

KHz

Logic (EN and INPUT) Section

INPUT Logic High Threshold Voltage

1.34

V

INPUT Logic Low Threshold Voltage

0.5

V

Input Low Current for INPUT and EN

1

µA

Input High Current for INPUT and EN

8

12

16

µA

Input Logic Pull-Down Resistance

250

375

K

Ω

Input Logic Operating Frequency

(8)

20

1000

Hz

Full-Bridge Switch Section

Output Upper-Side On Resistance

3.0

5.0

Ω

Output Low-Side On Resistance

3.0

5.0

Ω

Output Control Section

Analog Output Control Maximum Voltage

(8)

1.0

V

Analog Output Control Minimum Voltage

(8)

0.1

V

Internal Current Source for ADJ Pin

9

10

11

µA

Protection (Ready, OVP and TSD)

Output Ready Threshold Voltage

0.75

0.80

0.85

V

Output Ready Hysteresis

0.2

V

OVP Threshold Voltage at FB Pin

1.05

1.10

1.15

V

OVP Hysteresis Voltage at FB Pin

0.1

V

OVP Threshold Voltage at OVP Pin

1.10

1.15

1.20

V

OVP Hysteresis Voltage at OVP Pin

0.15

V

Thermal Shutdown Temperature

(8)

150

°C

Hysteresis Temperature of TSD

(8)

50

°C

Fault Output Duration

20

30

µs

Fault Output Low Level Voltage

0.1

0.4

V

Note:

8.

This parameter, although guaranteed by design, is not tested in production.