ZHCSIQ5A September 2018 – August 2021 LM34936
PRODUCTION DATA
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Fixed Frequency Valley/Peak Current Mode Control with Slope Compensation
- 7.3.2 VCC Regulator and Optional BIAS Input
- 7.3.3 Enable/UVLO
- 7.3.4 Soft-Start
- 7.3.5 Overcurrent Protection
- 7.3.6 Average Input/Output Current Limiting
- 7.3.7 Operation Above 28-V Input
- 7.3.8 CCM Operation
- 7.3.9 Frequency and Synchronization (RT/SYNC)
- 7.3.10 Frequency Dithering
- 7.3.11 Output Overvoltage Protection (OVP)
- 7.3.12 Power Good (PGOOD)
- 7.3.13 Gm Error Amplifier
- 7.3.14 Integrated Gate Drivers
- 7.3.15 Thermal Shutdown
- 7.4 Device Functional Modes
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Custom Design with WEBENCH Tools
- 8.2.2.2 Frequency
- 8.2.2.3 VOUT
- 8.2.2.4 Inductor Selection
- 8.2.2.5 Output Capacitor
- 8.2.2.6 Input Capacitor
- 8.2.2.7 Sense Resistor (RSENSE)
- 8.2.2.8 Slope Compensation
- 8.2.2.9 UVLO
- 8.2.2.10 Soft-Start Capacitor
- 8.2.2.11 Dither Capacitor
- 8.2.2.12 MOSFETs QH1 and QL1
- 8.2.2.13 MOSFETs QH2 and QL2
- 8.2.2.14 Frequency Compensation
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RHF|28
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RHF|28
訂購信息
6.6 Typical Characteristics
At TA = 25°C, unless otherwise stated.
| VOUT=12 V | Fsw=300 kHz | L1=4.7 μH |
| IOUT=5 A |
Figure 6-3 Oscillator Frequency
Figure 6-5 IIN Operating vs VIN
Figure 6-7 ENABLE/UVLO Rising Threshold vs Temperature
Figure 6-9 Boost Current Limit vs Temperature
| VOUT=12 V | VIN=11 V | |
| VOUT=12 V | VIN=13 V | |
| VIN=6 V | VOUT=12 V | Load 3A to 6A |
| VIN=24 V | VOUT=12 V | Load 3A to 6A |
| VIN=24 V | VOUT=12 V | Hiccup Enabled |
| VOUT =12 V | Fsw=300 kHz | L1=4.7 μH |
Figure 6-4 VCC vs VIN
Figure 6-6 IIN Shutdown vs VIN
Figure 6-8 Buck Current Limit vs Temperature
| VOUT=12 V | VIN=6 V | |
| VOUT=12 V | VIN=12 V | |
| VOUT=12 V | VIN=24 V | |
| VIN=12 V | VOUT=12 V | Load 3A to 6A |
| VIN=8 V to 24 V | VOUT=12 V | IOUT=3A |
| VIN=24 V | RSNS=10 mΩ | |