ZHCSPG3A
May 2008 – July 2022
UC2843A-Q1
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Electrical Characteristics
6.5
Thermal Information
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Pulse-by-Pulse Current Limiting
7.3.2
Current Sense Circuit
7.3.3
Error Amplifier Configuration
7.3.4
Undervoltage Lockout
7.3.5
Oscillator
7.4
Device Functional Modes
7.4.1
Normal Operation
7.4.2
Undervoltage Lockout (UVLO) Start-Up
7.4.3
UVLO Turnoff Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
11
Device and Documentation Support
11.1
Device Support
11.1.1
Development Support
11.1.1.1
Custom Design With WEBENCH® Tools
11.1.2
Device Nomenclature
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Related Links
11.4
接收文档更新通知
11.5
支持资源
11.6
Trademarks
11.7
Electrostatic Discharge Caution
11.8
术语表
12
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
D|8
MSOI002K
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcspg3a_oa
zhcspg3a_pm
11.1.2
Device Nomenclature
C
IN
Input bulk capacitance
C
OUT
Output capacitance
D
Duty cycle
ESR
Equivalent series resistance
G
BC
(f)
An estimate of the transfer function from the output of the opto-isolator to the PWM control voltage.
G
O
The DC gain of the control to output transfer function.
G
OPTO
(f)
The approximate transfer function across the opto-isolator in the design.
I
LPM
Transformer primary average current
I
LpPK
Peak transformer primary current
L
PM
Transformer primary magnetizing inductance
L
SM
Transformer secondary magnetizing inductance
N
PS
Primary to secondary transformer turns ratio
N
AS
Auxiliary to secondary transformer turns ratio
T
V
(f)
is the feedback control loop transfer function.
V
INripple
Input ripple voltage