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TPS61196-Q1 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS61196-Q1 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 31 page L1 68mH D1 IFB1 ISNS VIN VDD ISET AGND TPS61196 GDRV FSW C1 10mF PWM2 VIN = 24V OVP R3 EN R19 R6 C6 C5 PGND COMP FBP R7 UVLO PWM5 FAULT R12 C3 1.0 F m R9 R11 REF R1 R2 100mF C7 IFBV R10 C2 2.2mF C9 200k 2.2mF 37.4k 196k 60.4k 0.1mF Thermal pad PWM6 PWM3 PWM4 PWM1 IFB2 IFB6 150k 47nF C8 R4 Q1 160pF C4 10nF R8 3 0.1 470pF 200 255k 10k EC2 EC1 100mF 182k 24.9k IFB3 IFB4 IFB5 R13 10M R14 10M R15 10M R16 10M R17 10M R18 10M R5 200k Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS61196-Q1 SNVSA79 – MARCH 2015 TPS61196-Q1 6-String 400-mA WLED Driver with Independent PWM Dimming For Each String The TPS61196-Q1 adjusts the boost controller's 1 Features output voltage automatically to provide only the 1 • 8-V to 30-V Input Voltage voltage required by the LED string with the largest • Up to 120-V Output Voltage forward voltage drop plus the minimum required voltage at that string's IFB pin, thereby optimizing • 100-KHz to 800-kHz Programmable Switching driver efficiency. Its switching frequency is Frequency programmed by an external resistor from 100 kHz to • Adaptive Boost Output for LED Voltages 800 kHz. • Six Current Sinks, 200-mA Continuous Output, The TPS61196-Q1 supports direct PWM brightness 400-mA Pulse Output for Each String dimming. Each string has an independent PWM • ±1.5% Current Matching Between Strings control input. During the PWM dimming, the LED • High Precision PWM Dimming Resolution up to current is turned on or turned off at the frequency and duty cycle which are determined by the external 5000:1 PWM signal. The PWM frequency ranges from 90 Hz • Programmable OVP Threshold to 22 kHz. • Programmable Input UVLO Threshold The TPS61196-Q1 integrates overcurrent protection, • Adjustable Soft-Start Time output short-circuit protection, ISET short-to-ground • Built-in LED Open and Short Protection protection, diode open and short protection, LED • Built-in Schottky Diode Open and Short Protection open and short protection, and overtemperature shutdown circuit. In addition, the TPS61196-Q1 can • Built-in ISET Short Protection detect the IFB pin short to ground to protect the LED • Built-in IFB Short Protection string. The device also provides programmable input • Thermal Shutdown undervoltage lockout threshold and output overvoltage protection threshold. 2 Applications Device Information(1) • Automotive LCD Backlighting PART NUMBER PACKAGE BODY SIZE (NOM) • Automotive Cluster Displays TPS61196-Q1 HTSSOP (28) 9.70 mm x 4.40 mm • Automotive Secondary Displays (1) For all available packages, see the orderable addendum at the end of the datasheet. 3 Description The TPS61196-Q1 provides a highly integrated Simplified Schematic solution for automotive LCD backlighting 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. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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