UCC28730-Q1 Datasheet, PDF (1/42 Pages) Texas Instruments – Zero-Power Standby PSR Flyback Controller for Automotive

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UCC28730-Q1 Zero-Power Standby PSR Flyback Controller
for Automotive
UCC28730-Q1
SLUSCR9 – JUNE 2017
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following Results:
– Device Temperature Grade 1: -40⁰C to +125⁰C
– Device HBM Classification Level 2: ±2 kV
– Device CDM Classification Level C4B: ±750 V
• Enables Zero-Power (< 5 mW) Standby
Consumption
• Primary-Side Regulation (PSR) Eliminates Opto-
coupler
• ±5% Voltage Regulation and Current Regulation
Across Line and Load
• 700-V Start-up Switch
• 83-kHz Maximum Switching Frequency Enables
Low Stand-by Power Charger Designs
• Resonant-Ring Valley-Switching Operation for
Highest Overall Efficiency
• Frequency-Dither to Ease EMI Compliance
• Clamped Gate-Drive Output for MOSFET
• Over-Voltage, Low-Line, and Over-Current
Protection Functions
• Programmable Cable Compensation
• SOIC-7 Package
2 Applications
• Automotive Power Supplies
• Hybrid and Electric Vehicles in Automotive
• SMPS for Home Appliances and Industrial
Automation
• Standby and Auxiliary Power Supplies
3 Description
The UCC28730-Q1 isolated-flyback power supply
controller provides Constant-Voltage (CV) and
Constant-Current (CC) output regulation without the
use of an optical coupler. A minimum switching
frequency of 30 Hz facilitates achieving less than 5
mW of no-load power. This device processes
information from the primary power switch and an
auxiliary flyback winding for precise control of output
voltage and current.
An internal 700-V start-up switch, dynamically-
controlled operating states and a tailored modulation
profile support ultra-low stand-by power without
sacrificing start-up time or output transient response.
Control algorithms in the UCC28730-Q1 allow
operating efficiencies to meet or exceed applicable
standards. Discontinuous conduction mode (DCM)
operation with valley-switching reduces switching
losses. Modulation of the switching frequency and
primary current peak amplitude (FM and AM) keeps
the conversion efficiency high across the entire load
and line ranges.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCC28730-Q1
SOIC (7)
4.90 mm x 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
VAC
VAUX
NA
DA
RS1
RS2
Simplified Schematic
VBULK
VOUT
NP
NS
IOUT
CB1
CB2
UCC24650
VSEC _{5 WAKE VDD 1}
COUT
3 ENS GND 2
RPL
DS
UCC28730-Q1
1 VDD HV 7
CVDD
2 VS
DRV 6
CS 5
M1
RLC
3 CBC
RCBC
GND
RCS
4
Copyright © 2017, Texas Instruments Incorporated
Zero-Power Input Consumption at No-Load
5.1 V +/-5% Cout = 540 mF
2-A Load Step
Input
Voltage
115 VRMS
230 VRMS
No-load
Input Power
3.0 mW
3.5 mW
Switching Pulses
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.