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TPS61196

アクティブ

各ストリング向けの個別 PWM 調光機能搭載、6 ストリング、400mA WLED ドライバ

製品詳細

Number of channels 6 Vin (min) (V) 8 Vin (max) (V) 30 Vout (min) (V) 8 Vout (max) (V) 120 Type Inductive Switching frequency (max) (kHz) 800 Duty cycle (max) (%) 96 LED current per channel (mA) 200 Peak efficiency (%) 96 Topology Boost Features OVP Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 6 Vin (min) (V) 8 Vin (max) (V) 30 Vout (min) (V) 8 Vout (max) (V) 120 Type Inductive Switching frequency (max) (kHz) 800 Duty cycle (max) (%) 96 LED current per channel (mA) 200 Peak efficiency (%) 96 Topology Boost Features OVP Operating temperature range (°C) -40 to 85 Rating Catalog
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4
  • 8-V to 30-V Input Voltage
  • Up to 120-V Output Voltage
  • 100-KHz to 800-kHz Programmable Switching
    Frequency
  • Adaptive Boost Output for LED Voltages
  • Six Current Sinks, 200-mA Continuous Output,
    400-mA Pulse Output for Each String
  • ±1.5% Current Matching Between Strings
  • High Precision PWM Dimming Resolution up to
    5000:1
  • Programmable Overvoltage Threshold at Output
    and Each Current Sink
  • Programmable Undervoltage Threshold at Input
    with Adjustable Hysteresis
  • Adjustable Soft Start Time Independent of
    Dimming Duty Cycle
  • Built-in LED Open and LED Short Protection
  • Built-in Schottky Diode Open/Short Protection
  • Built-in ISET Short Protection
  • Built-in IFB Short Protection
  • Thermal Shutdown
  • 8-V to 30-V Input Voltage
  • Up to 120-V Output Voltage
  • 100-KHz to 800-kHz Programmable Switching
    Frequency
  • Adaptive Boost Output for LED Voltages
  • Six Current Sinks, 200-mA Continuous Output,
    400-mA Pulse Output for Each String
  • ±1.5% Current Matching Between Strings
  • High Precision PWM Dimming Resolution up to
    5000:1
  • Programmable Overvoltage Threshold at Output
    and Each Current Sink
  • Programmable Undervoltage Threshold at Input
    with Adjustable Hysteresis
  • Adjustable Soft Start Time Independent of
    Dimming Duty Cycle
  • Built-in LED Open and LED Short Protection
  • Built-in Schottky Diode Open/Short Protection
  • Built-in ISET Short Protection
  • Built-in IFB Short Protection
  • Thermal Shutdown

The TPS61196 provides a highly integrated solution for LCD TV backlight with an independent PWM dimming function for each string. This device is a current mode boost controller driving up to six WLED strings with multiple LEDs in series. Each string has an independent current regulator providing a LED current adjustable from 50 mA to 400 mA within ±1.5% matching accuracy. The minimal voltage at the current sink is programmable in the range of 0.3 V to 1 V to fit with different LED current settings. The input voltage range for the device is from 8 V to 30 V.

The device adjusts the boost controller'’s output voltage automatically to provide only the voltage required by the LED string with the largest forward voltage drop plus the minimum required voltage at that string's IFB pin, thereby optimizing driver efficiency. Its switching frequency is programmed by an external resistor from 100 kHz to 800 kHz.

The TPS61196 supports direct PWM brightness dimming. Each string has an independent PWM control input. During the PWM dimming, the LED current is turned on or turned off at the frequency and duty cycle which are determined by the external PWM signal. The PWM frequency ranges from 90 Hz to 22 kHz.

The device integrates overcurrent protection, output short-circuit protection, ISET short-to-ground protection, diode open and short protection, LED open and short protection, and overtemperature shutdown circuit. In addition, the TPS61196 can detect the IFB pin short to ground to protect the LED string. The device also provides programmable input undervoltage lockout threshold and output overvoltage protection threshold.

The TPS61196 has a built-in linear regulator which steps down the input voltage to the VDD voltage for powering the internal circuitry. An soft-start circuit is implemented internally to work with an external capacitor to adjust the soft start-up time to minimize the in-rush current during boost converter start-up. The device is available in a 28-pin HTSSOP package with PowerPAD.

The TPS61196 provides a highly integrated solution for LCD TV backlight with an independent PWM dimming function for each string. This device is a current mode boost controller driving up to six WLED strings with multiple LEDs in series. Each string has an independent current regulator providing a LED current adjustable from 50 mA to 400 mA within ±1.5% matching accuracy. The minimal voltage at the current sink is programmable in the range of 0.3 V to 1 V to fit with different LED current settings. The input voltage range for the device is from 8 V to 30 V.

The device adjusts the boost controller'’s output voltage automatically to provide only the voltage required by the LED string with the largest forward voltage drop plus the minimum required voltage at that string's IFB pin, thereby optimizing driver efficiency. Its switching frequency is programmed by an external resistor from 100 kHz to 800 kHz.

The TPS61196 supports direct PWM brightness dimming. Each string has an independent PWM control input. During the PWM dimming, the LED current is turned on or turned off at the frequency and duty cycle which are determined by the external PWM signal. The PWM frequency ranges from 90 Hz to 22 kHz.

The device integrates overcurrent protection, output short-circuit protection, ISET short-to-ground protection, diode open and short protection, LED open and short protection, and overtemperature shutdown circuit. In addition, the TPS61196 can detect the IFB pin short to ground to protect the LED string. The device also provides programmable input undervoltage lockout threshold and output overvoltage protection threshold.

The TPS61196 has a built-in linear regulator which steps down the input voltage to the VDD voltage for powering the internal circuitry. An soft-start circuit is implemented internally to work with an external capacitor to adjust the soft start-up time to minimize the in-rush current during boost converter start-up. The device is available in a 28-pin HTSSOP package with PowerPAD.

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技術資料

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種類 タイトル 最新の英語版をダウンロード 日付
* データシート TPS61196 6-String 400-mA WLED Driver with Independent PWM Dimming for Each String データシート (Rev. D) PDF | HTML 2015年 5月 1日
ホワイト・ペーパー Common LED Functions and LED Driver Design Considerations.. 英語版 2020年 9月 21日
アプリケーション・ノート Some Guidelines and Tips for the LED Driver Application 2019年 8月 14日
アプリケーション・ノート Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018年 12月 11日
セレクション・ガイド 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) 英語版 (Rev.R) 2018年 9月 13日
EVM ユーザー ガイド (英語) TPS61196EVM-600 User's Guide (Rev. A) 2014年 2月 25日

設計および開発

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評価ボード

TPS61196EVM-600 — WLED ドライバ・ストリング評価モジュール

The Texas Instruments TPS61196EVM-600 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS61196 , which are multi-channel WLED drivers providing highly integrated solutions for LCD TV backlight. The EVM is designed to operate from an input voltage source ranging (...)

ユーザー ガイド: PDF
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購入と品質

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  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
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  • 組み立てを実施した拠点

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