L6591TR データシートの表示（PDF） - STMicroelectronics

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L6591TR

PWM controller for ZVS half bridge

STMicroelectronics 

Pin settings

2

Pin settings

2.1

Connection

Figure 3. Pin connection (top view)

L6591

2.2

LINE 1

DIS 2

ISEN 3

SS 4

OSC 5

VREF 6

COMP 7

PFC_STOP 8

16 HVSTART

15 BOOT

14 HVG

13 FGND

12 N.C.

11 GND

10 LVG

9 Vcc

AM13254v1

Functions

Table 1.

Pin N.

1

2

Pin functions

Name

Function

LINE

Line sensing input. The pin is to be connected to the high-voltage input bus

with a resistor divider. A voltage below 1.25 V shuts down the IC, lowers its

consumption and discharges the soft-start capacitor. IC operation is re-

enabled as the voltage exceeds 1.25 V. The comparator is provided with

current hysteresis: an internal 15 µA current generator is ON as long as the

voltage applied at the pin is below 1.25 V, and is OFF if this value is

exceeded. Bypass the pin with a capacitor to GND (#11) to reduce noise

pick-up. The pin is intended for either power-on sequencing in systems with

PFC, or brownout protection. Tie to Vcc (#9) with a 220 to 330 kΩ resistor if

the function is not used.

Latched device shutdown. Internally, the pin connects a comparator that,

when the voltage on the pin exceeds 4.5 V, shuts the IC down and brings its

DIS

consumption to a value barely higher than before startup. The information is

latched and it is necessary to recycle the input power to restart the IC: the

latch is removed as the voltage on the Vcc pin (#9) goes below the UVLO

threshold. Connect the pin to GND (#11) if the function is not used.

4/41

Doc ID 14821 Rev 6

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