Datasheet TPS40210, TPS40211 (Texas Instruments) - 3

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TPS40210 , TPS40211 www.ti.com
SLUS772F – MARCH 2008 – REVISED MARCH 2015
5 Pin Configuration and Functions DGQ DRC 10-Pin 10-Pin Top View Top View RC 1 10 VDD RC 1
1
10 VDD SS 2 9 BP SS 2 9 BP DIS/EN 3 8 GDRV DIS/EN 3 8 GDRV COMP 4 7 ISNS COMP 4 7 ISNS FB 5 6 GND FB 5 6 GND Pin Functions PIN I/O DESCRIPTION NAME NO.
BP 9 O Regulator output pin. Connect a 1.0 μF bypass capacitor from this pin to GND. COMP 4 O Error amplifier output. Connect control loop compensation network between COMP pin and FB pin. Disable pin. Pulling this pin high, places the part into a shutdown mode. Shutdown mode is characterized by a very low quiescent current. While in shutdown mode, the functionality of all blocks is disabled and the BP DIS/EN 3 I regulator is shut down. This pin has an internal 1 MΩ pull-down resistor to GND. Leaving this pin unconnected enables the device. Error amplifier inverting input. Connect a voltage divider from the output to this pin to set output voltage. FB 5 I Compensation network is connected between this pin and COMP. GDRV 8 O Connect the gate of the power N channel MOSFET to this pin. GND 6 - Device ground. Current sense pin. Connect an external current sensing resistor between this pin and GND. The voltage on this pin is used to provide current feedback in the control loop and detect an overcurrent condition. An ISNS 7 I overcurrent condition is declared when ISNS pin voltage exceeds the overcurrent threshold voltage, 150 mV typical. Switching frequency setting pin. Connect a resistor from RC pin to VDD of the IC power supply and a RC 1 I capacitor from RC to GND. Soft-start time programming pin. Connect capacitor from SS pin to GND to program converter soft-start time. SS 2 I This pin also functions as a timeout timer when the power supply is in an overcurrent condition. System input voltage. Connect a local bypass capacitor from this pin to GND. Depending on the amount of VDD 10 I required slope compensation, this pin can be connected to the converter output. See Application Information section for additional details.
6 Specifications 6.1 Absolute Maximum Ratings
over operating free-air temperature range unless otherwise noted(1)
MIN MAX UNIT
VDD –0.3 52 Input voltage RC, SS, FB, DIS/EN –0.3 10 V ISNS –0.3 8 Output voltage COMP, BP, GDRV –0.3 9 TJ Operating junction temperature –40 150 °C Tstg Storage temperature –55 150 °C (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Copyright © 2008–2015, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: TPS40210 TPS40211 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Typical Characteristics 7 Detailed Description 7.1 Overview 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Soft-Start 7.3.2 BP Regulator 7.3.3 Shutdown (DIS/EN Pin) 7.3.4 Minimum On-Time and Off-Time Considerations 7.3.5 Setting the Oscillator Frequency 7.3.6 Synchronizing the Oscillator 7.3.7 Current Sense and Overcurrent 7.3.8 Current Sense and Sub-Harmonic Instability 7.3.9 Current Sense Filtering 7.3.10 Control Loop Considerations 7.3.11 Gate Drive Circuit 7.3.12 TPS40211 7.4 Device Functional Modes 7.4.1 Operation Near Minimum Input Voltage 7.4.2 Operation With DIS/EN Pin 8 Application and Implementation 8.1 Application Information 8.2 Typical Applications 8.2.1 12-V to 24-V Nonsynchronous Boost Regulator 8.2.1.1 Design Requirements 8.2.1.2 Detailed Design Procedure 8.2.1.3 Application Curves 8.2.2 12-V Input, 700-mA LED Driver, Up to 35-V LED String 8.2.2.1 Design Requirements 8.2.2.2 Detailed Design Procedure 9 Power Supply Recommendations 10 Layout 10.1 Layout Guidelines 10.2 Layout Example 11 Device and Documentation Support 11.1 Device Support 11.1.1 Third-Party Products Disclaimer 11.1.2 Related Devices 11.2 Documentation Support 11.2.1 Custom Design with WEBENCH Tools 11.2.2 Receiving Notification of Documentation Updates 11.2.3 References 11.3 Related Links 11.4 Trademarks 11.5 Electrostatic Discharge Caution 11.6 Glossary 12 Mechanical, Packaging, and Orderable Information