The TPS61199 provides highly integrated solutions for large size LCD backlighting. This
device integrates a current-mode boost controller and eight current sinks for driving up to eight
LED strings with multiple LEDs in series. Each string has an independent current regulator with
current matching between strings reaching 3% regulation accuracy. The device automatically adjusts
the output voltage of the boost converter to provide only the voltage required by the LED string
with the largest forward voltage drop plus the minimum required voltage at the IFBx pin of that
string, thereby optimizing efficiency of the driver.
The TPS61199 provides PWM brightness dimming with an external PWM signal. The signal of
the PWM maximum frequency can be as high as 22 kHz. Dimming ratios up to 5000:1 can be achieved
with a 200-Hz PWM signal. The TPS61199 integrates overcurrent protection for the switch FET, soft
start-up, LED short protection, LED open protection, and overtemperature shutdown protection. The
TPS61199 device is available in 20-pin SO and HTSSOP packages.
For all available packages, see the orderable addendum at the
end of the data sheet.
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