JAJSNI2B
May 2008 – October 2024
UC2843A-Q1
PRODUCTION DATA
1
1
特長
2
アプリケーション
3
概要
4
Pin Configuration and Functions
Pin Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
Pulse-by-Pulse Current Limiting
6.3.2
Current Sense Circuit
6.3.3
Error Amplifier Configuration
6.3.4
Undervoltage Lockout
6.3.5
Oscillator
6.4
Device Functional Modes
6.4.1
Normal Operation
6.4.2
Undervoltage Lockout (UVLO) Start-Up
6.4.3
UVLO Turnoff Mode
7
Application and Implementation
7.1
Application Information
7.2
Typical Application
8
Power Supply Recommendations
9
Layout
9.1
Layout Guidelines
10
Device and Documentation Support
10.1
Device Support
10.1.1
Development Support
10.1.1.1
Custom Design With WEBENCH® Tools
10.1.2
Device Nomenclature
10.2
Documentation Support
10.2.1
Related Documentation
10.3
Related Links
10.4
ドキュメントの更新通知を受け取る方法
10.5
サポート・リソース
10.6
Trademarks
10.7
静電気放電に関する注意事項
10.8
用語集
11
Revision History
12
Mechanical, Packaging, and Orderable Information
パッケージ・オプション
メカニカル・データ（パッケージ｜ピン）
D|8
MSOI002K
サーマルパッド・メカニカル・データ
発注情報
jajsni2b_oa
jajsni2b_pm
10.1.2
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