Datasheet > UCC28700-Q1_15

UCC28700-Q1_15

更新时间： 2024-11-24 01:14:15

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
38页	1732K
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Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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UCC28700-Q1

SLUSC61 –JANUARY 2015

UCC28700-Q1 Constant-Voltage, Constant-Current Controller

With Primary-Side Regulation

1 Features

3 Description

The UCC28700-Q1 of flyback power supply

•

Qualified for Automotive Applications

controllers provides Constant-Voltage (CV) and

Constant-Current (CC) output regulation without the

use of an optical coupler. The devices process

information from the primary power switch and an

auxiliary flyback winding for precise control of output

voltage and current. Low start-up current, dynamically

controlled operating states and a tailored modulation

profile support very low standby power without

sacrificing start-up time or output transient response.

AEC-Q100 Qualified with the Following Results:

–

Device Temperature Grade 1: –40°C to 125°C

Device HBM Classification Level 2: ±2 kV

Device CDM Classification Level C4B: 750 V

•

< 30-mW Standby Power Consumption

Primary-Side Regulation (PSR) Eliminates Opto-

Coupler

•

±5% Voltage and Current Regulation

130-kHz Maximum Switching Frequency

Control algorithms in the UCC28700-Q1 allows

operating efficiencies to meet or exceed applicable

standards. The output drive interfaces to a MOSFET

power switch. Discontinuous Conduction Mode

(DCM) with valley switching reduces switching losses.

Modulation of switching frequency and primary

current peak amplitude (FM and AM) keeps the

conversion efficiency high across the entire load and

line ranges.

Quasi-Resonant Valley-Switching Operation for

Highest Overall Efficiency

•

Patent-Pending Frequency-Jitter Scheme to Ease

EMI Compliance

•

Wide VDD Range Allows Small Bias Capacitor

Clamped Gate-Drive Output for MOSFET

The controllers have a maximum switching frequency

of 130 kHz and always maintain control of the peak-

primary current in the transformer. Protection features

help keep primary and secondary component

stresses in check. The UCC28700-Q1 allows the

level of cable compensation to be programmed.

Protection Functions: Overvoltage, Low-Line, and

Overcurrent

•

Programmable Cable Compensation

SOT23-6 Package

2 Applications

Device Information⁽¹⁾

•

Automotive AC-to-DC and DC-to-DC Power

Conversion

PART NUMBER

PACKAGE

BODY SIZE (NOM)

UCC28700-Q1

SOT-23 (6)

2.90 mm × 1.60 mm

Auxiliary Power Supply for Automotive Power

Train in HEV

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Flyback and Buck Power Converters

Typical Application Schematic

V_REG

V_BLK

R_PL

C_B1

C_B2

V_OUT

C_OUT

VAC

R_STR

UCC28700-Q1

SOT23-6

V_AUX

VDD

C_DD

R_S1

DRV

R_S2

R_LC

CBC

R_CS

R_CBC

GND

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.

12 3 4 5 6 7...38

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