L6611D Просмотр технического описания (PDF) - STMicroelectronics

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L6611D

DIGITALLY PROGRAMMABLE SECONDARY HOUSEKEEPING CONTROLLER

STMicroelectronics 

L6611

FUNCTION DESCRIPTION (continued)

Name

Description

Soft-start

The IC provides an on-board 8ms soft-start, a quasi-monotonic ramp from 0V to 2.5V for the A

error amplifier reference voltage, in order to avoid high current peaks in the primary circuit and

output voltage overshoots at start-up. In fact, if this reference gets the nominal value as soon as

the power-up occurs, the A E/A will go out of regulation and tend to sink much more current, thus

forcing PWM to work with the maximum duty-cycle.

Bounce or

Latch-mode

This option allows setting either latched-mode or auto restart after 1 second delay in case of

undervoltage faults.

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

Vdd

Supply voltage

-0.5 to +7

V

Voltage on PROG, PS-ON/Clock, DFAULT, VREF, and error

amplifier pins

-0.5 to Vdd+0.5

V

Voltage on MFAULT, PW-OK, Dmon and positive UV, OV, OC, AC

-0.5 to +16

V

sense pins.

Voltage on and -12V UV/OV sense pin

-16 to +5

V

Maximum current in ESD clamp diodes

10

mA

TJ

Operating Junction Temperature

-25 to 150

°C

TSTO Storage Temperature

-50 to 150

°C

TL

Lead Temperature (soldering, 10 seconds)

300

°C

THERMAL DATA

Symbol

Parameter

Rth j-amb Max. Thermal Resistance junction-to-ambient (*)

(*) mounted on board

DIP20

70

SO20

120

Unit

°C/W

6/28

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