3 Description
The TPS61194-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver with integrated DC-DC converter. The DC-DC converter supports both boost and SEPIC mode operation. The device has four high-precision current sinks that can be combined for higher current capability.
The DC-DC converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to the lowest sufficient level in all conditions. For EMI reduction DC-DC supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the TPS61194-Q1 to avoid disturbance for AM radio band.
The input voltage range for the TPS61194-Q1 is from 4.5 V to 40 V to support automotive stop/start and load dump condition. The TPS61194-Q1 integrates extensive fault detection features.
Device Information(1)
PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
TPS61194-Q1 |
HTSSOP (20) |
6.50 mm × 4.40 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
4 Revision History
Changes from C Revision (April 2017) to D Revision
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Enhanced pin descriptions for pins 3, 10 and 16 in Pin Functions Go
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Deleted "Dimming ratio is calculated as ratio between the input PWM period and minimum on/off time (0.5 µs). " from Brightness ControlGo
Changes from B Revision (October 2016) to C Revision
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Deleted "IOUT = 100 mA" from tON/OFF row of Table 7.9Go
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Changed "0.5" from MAX to TYP column in tON/OFF row of Table 7.9 Go
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Added table note 1 for Tables 7.9 and 7.10Go
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Deleted "Initial DC-DC voltage is about 88% of VMAX BOOST." from Integrated DC-DC Converter; change wording in last sentence before equation 1.Go
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Changed eq. 1; added "K" eq definitions for eq. 1 and paragraph after Fig. 9 Go
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Added new paragraph before Internal LDOGo
Changes from A Revision (January 2016) to B Revision
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Deleted wording of several items in Features Go
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Changed "Output Current" to "LED String Current" and "High Dimming Ratio of 10 000:1 at 200 Hz" to "High Dimming Ratio of 10 000:1 at 100 Hz"Go
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Added additional Applications Go
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Changed some wording in Description - for clarity Go
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Changed "The high switching frequency" to "A wide-range adjustable frequency"Go
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Added Device Comparison table Go
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Added 2 new LED Current graphsGo
Changes from * Revision (December 2015) to A Revision
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Changed preview to production data Go