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TEA1716T Datasheet(PDF) 6 Page - NXP Semiconductors |
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TEA1716T Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 47 page TEA1716T All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. 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 Pin Description |
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