Secondary Side Housekeeping Circuit

AS23xx

97

ASTEC Semiconductor

Electrical Characteristics are guaranteed over full junction temperature range (0 to 105

° C). Ambient temperature must be derated

+3.3 V = 3.3 V; +5 V = 5V; +12 V = 12 V; –12 V = –12 V; – 5 V = – 5 V.

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Typical Performance Curves

Not Available at Time of Publishing

Voltage Reference

Output Voltage

° C

2.488

2.500

2.525

V

Line Regulation

10

15

mV

Load Regulation

10

15

mV

Temperature Deviation*

° C10

15

mV

Start-Up Functions

UVB Pull-up Current Source

– 0.4

–1

–1.9

µA

UVB Clamp

µA; no faults

2.9

3.1

3.3

V

UVB Discharge Current

3

8

mA

(AC shutdown)

AC < 2.5 V

UVB Discharge Current

2.5

10

mA

(FAULT shutdown)

AC > 2.5 V

UVB Low Output Voltage

µA; FAULT = low; AC < 2.5 V

0.2

V

PG CAP Pull-up Current Source

– 0.5

–1

–1.4

µA

PG CAP Clamp

µA; no faults; AC > 2.5 V

2.9

3.1

3.3

V

PG CAP Discharge Current

2

6

mA

condition

PG CAP Low Output Voltage

µA; undervoltage condition

0.2

V

OFF Input High Voltage

2.0

V

OFF Input Low Voltage

0.8

V

25

50

100

k

Ω

DELAY Pull-up Current Source

– 0.5

–1

–2.0

µA

DELAY Clamp

µA; OFF = high

2.9

3.1

3.3

V

DELAY Discharge Current

2.5

10

mA

DELAY Low Output Voltage

µA; OFF = low

0.2

V

*Temperature deviation is defined as the maximum deviation of the reference over the given temperature range and does not imply an

incremental deviation at any given temperature.