JAJSFD4A
May 2018 – November 2018
LM5122ZA
PRODUCTION DATA.
1
特長
2
アプリケーション
3
概要
Device Images
アプリケーション概略図
4
改訂履歴
5
概要(続き)
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Undervoltage Lockout (UVLO)
8.3.2
High-Voltage VCC Regulator
8.3.3
Oscillator
8.3.4
Slope Compensation
8.3.5
Error Amplifier
8.3.6
PWM Comparator
8.3.7
Soft Start
8.3.8
HO and LO Drivers
8.3.9
Bypass Operation (VOUT = VIN)
8.3.10
Cycle-by-Cycle Current Limit
8.3.11
Clock Synchronization
8.3.12
Maximum Duty Cycle
8.3.13
Thermal Protection
8.4
Device Functional Modes
8.4.1
MODE Control (Forced-PWM Mode and Diode-Emulation Mode)
8.4.2
MODE Control (Skip-Cycle Mode and Pulse-Skipping Mode)
8.4.3
Hiccup-Mode Overload Protection
8.4.4
Slave Mode and SYNCOUT
9
Application and Implementation
9.1
Application Information
9.1.1
Feedback Compensation
9.1.2
Sub-Harmonic Oscillation
9.1.3
Interleaved Boost Configuration
9.1.4
DCR Sensing
9.1.5
Output Overvoltage Protection
9.1.6
SEPIC Converter Simplified Schematic
9.1.7
Non-Isolated Synchronous Flyback Converter Simplified Schematic
9.1.8
Negative to Positive Conversion
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Timing Resistor RT
9.2.2.2
UVLO Divider RUV2, RUV1
9.2.2.3
Input Inductor LIN
9.2.2.4
Current Sense Resistor RS
9.2.2.5
Current Sense Filter RCSFP, RCSFN, CCS
9.2.2.6
Slope Compensation Resistor RSLOPE
9.2.2.7
Output Capacitor COUT
9.2.2.8
Input Capacitor CIN
9.2.2.9
VIN Filter RVIN, CVIN
9.2.2.10
Bootstrap Capacitor CBST and Boost Diode DBST
9.2.2.11
VCC Capacitor CVCC
9.2.2.12
Output Voltage Divider RFB1, RFB2
9.2.2.13
Soft-Start Capacitor CSS
9.2.2.14
Restart Capacitor CRES
9.2.2.15
Low-Side Power Switch QL
9.2.2.16
High-Side Power Switch QH and Additional Parallel Schottky Diode
9.2.2.17
Snubber Components
9.2.2.18
Loop Compensation Components CCOMP, RCOMP, CHF
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
デバイスおよびドキュメントのサポート
12.1
ドキュメントの更新通知を受け取る方法
12.2
コミュニティ・リソース
12.3
商標
12.4
静電気放電に関する注意事項
12.5
Glossary
13
メカニカル、パッケージ、および注文情報
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)
PWP|24
MPDS372A
サーマルパッド・メカニカル・データ
PWP|24
PPTD354
発注情報
jajsfd4a_oa
jajsfd4a_pm
7.2
ESD Ratings
VALUE
UNIT
V
(ESD)
Electrostatic discharge
Human body model (HBM), per JESD22-A114
(1)
±2000
V
Charged device model (CDM), per JESD22-C101
(2)
±1000
(1)
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2)
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.