PIN DESCRIPTION

Name

Pin

Type

Function

5

supply

Positive supply voltage. The DC supply voltage must be higher than

the maximum voltage applied on the 3.3, 5, 12V inputs (Is3.3, Is5,

Is12) plus 2V.

For example, if 13.2V is present on the Is12 input, the minimum

Vrefmain

14

analog input

Reference comparison input for main converter regulation loop.

2.5V +-1.6%

Fbmain

15

analog output

Output for main converter regulation loop (optocoupler)

Vrefaux

13

analog input

Reference comparison input for auxiliary converter regulation loop.

2.5V +-1.6%

Fbaux

12

analog output

Output for auxiliary converter regulation loop (optocoupler)

IS33

20

analog input

3.3V overcurrent control sense input.

V33

1

analog input

3.3V overvoltage control sense input.

IS5

19

analog input

5V overcurrent control sense input.

V5

2

analog input

5V overvoltage control sense input.

IS12

18

analog input

12V overcurrent control sense input.

V12

3

analog input

12V overvoltage control sense input.

Adj

4

ana input

Adjustment pin for 3.3V OVP. This pin is to be used for an OVP other

than 3.3V (eg for

µC power supply = 2.7V). When not in use, this pin

Tsur

17

program.

analog input

Overcurrent blank-out time 20 to 30ms settable through external RC.

The voltage at this pin is clamped at typically 5V. Trip voltage = 1.25V.

Rem

7

logic input

Remote On/Off logic input for

µC, turn off PWM after Trem delay.

Rem = 0 means that the main SMPS is operational.

Trem

8

program.

analog input

Connected to external capacitor to determine Trem (remote control

delay) timing. Trem (on to off) is 8ms typ. Trem (off to on) is 24ms typ.

Crem = 0.1

µF

PWM

6

logic output

Output signal to control the primary side of the main SMPS through

an opto-coupler. When PWM is low, the main SMPS is operational.

Tpor

10

program.

analog input

Connected to external capacitor for Power-on-reset timing.

Cpor = 2.2

µF

UV

11

analog input

Undervoltage detection, control and detect main AC voltage failure.

PG

9

logic input

Power Good logic output, 0 or 5V. Power Good high (=1) means that

the power is good for operation.

GND

16

supply

Ground or Negative supply voltage.

TSM111

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