TEA1716T datasheet(6/47 Pages) PHILIPS

Il numero della parte	TEA1716T

Spiegazioni elettronici	Resonant power supply control IC with PFC

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TEA1716T

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Product data sheet

Rev. 3 — 30 November 2012

6 of 47

NXP Semiconductors

TEA1716T

Resonant power supply control IC with PFC

7.

Functional description

7.1 Overview of IC modules

The functionality of the TEA1716T can be grouped as follows:

• Supply module:

Supply management for the IC. Includes the restart and (latched) shutdown states

• Protection and restart timer:

An externally adjustable timer used for delayed protection and restart timing

• Enable input:

Control input for enabling and disabling the controllers; when disabled has very low

current consumption

• PFC controller:

Controls and protects the Power Factor (PF) converter. Generates a 400 V (DC)

boost voltage from the rectified AC mains input with a high PF

• HBC controller:

Controls and protects the resonant converter; generates a regulated mains isolated

output voltage from the 400 V (DC) boost voltage

• Burst input:

Control input for Burst mode operation; activates the Burst stop state in which the

current consumption is low

Figure 1 shows the block diagram of the TEA1716T. A typical application is illustrated in

Figure 17.

HB

15

reference for high-side driver and input for half-bridge slope detection;

externally connected to half-bridge node HB between HBC MOSFETs

(see Figure 17)

n.c.

16

not connected; high-voltage spacer

SNSCURHBC 17

momentary HBC current sense input; externally connected to resonant

current sense resistor

SGND

18

signal ground and IC reference (ground)

CFMIN

19

HBC minimum frequency setting; externally connected to capacitor

SNSBURST

20

burst stop activation sense input; externally connected to resistive divided

SNSFB voltage

SNSFB

21

output voltage regulation feedback sense input; externally connected to

optocoupler and pull-up resistor

SSHBC/EN

22

HBC soft-start timing of HBC and IC enable input; enables PFC or PFC

only or both PFC and HBC controllers; externally connected to soft-start

capacitor and enable pull-down signal

RCPROT

23

protection timer setting for time-out and restart; externally connected to

resistor and capacitor

SNSBOOST

24

sense input for boost voltage regulation; externally connected to resistive

divided boost voltage

Table 2.

Pin description …continued

Symbol

Description

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