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TPS92641PWPT Datasheet(PDF) 1 Page - Texas Instruments

No. de Pieza. TPS92641PWPT
Descripción  Synchronous Buck Controllers for Precision Dimming LED Drivers
Descarga  37 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS92641PWPT Datasheet(HTML) 1 Page - Texas Instruments

 
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VIN
RON
UDIM
VOUT
VREF
IADJ
COMP
SDIM
HG
SW
BOOT
VCC
LG
CS
GND
SDRV
DAP
TPS92640/641
PWM
*SDIM
VIN
CIN1
CIN2
RUDIM1
RUDIM2
RUDIM3
CON
RON
RVOUT2
CVREF
RIADJ1
RIADJ2
CCOMP
RHG
RLG
CBOOT
DBOOT
RF
CVCC
RCS
L
QHS
QLS
*QSDIM
COUT
RVOUT1
*TPS92641 ONLY
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Folder
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TPS92640, TPS92641
SNVS902A – OCTOBER 2012 – REVISED OCTOBER 2015
TPS9264x Synchronous Buck Controllers for Precision Dimming LED Drivers
1 Features
3 Description
The TPS92640 and TPS92641 devices are high-
1
VIN Range from 7 V to 85 V
voltage, synchronous NFET controllers for buck-
Wide Dimming Range
current regulators. Output current regulation is based
500:1 Analog Dimming
on valley current-mode operation using a controlled
on-time architecture. This control method eases the
2500:1 Standard PWM Dimming
design of loop compensation while maintaining nearly
20000:1 Shunt FET PWM Dimming
constant switching frequency. The TPS92640 and
Adjustable LED Current Sense Voltage
TPS92641 devices include a high-voltage start-up
regulator that operates over a wide input range of 7 V
2-
Ω, 1-Apeak MOSFET Gate Drivers
to 85 V. The PWM controller is designed for high
Shunt Dimming MOSFET Gate Driver (TPS92641)
speed capability, including an oscillator frequency
Programmable Switching Frequency
range up to 1 MHz. The deadtime between high side
Precision Voltage Reference 3 V ±2%
and low side gate driver is optimized to provide very
high efficiency over a wide input operating voltage
Input UVLO and Output OVP
and
output
power
range.
The
TPS92640
and
Low Power Shutdown Mode and Thermal
TPS92641 devices accept both analog and PWM
Shutdown
input signals, resulting in exceptional dimming control
range. Linear response characteristics between input
2 Applications
command and LED current is achieved with true zero
LED current using low off-set error amplifier and
LED Driver / Constant Current Regulator
proprietary PWM dimming logic. Both devices also
Architectural LED Lighting Drivers
include precision reference capable of supplying
Automotive LED Drivers
current to low power microcontroller. Protection
features include cycle-by-cycle current protection,
General LED Illumination
overvoltage protection, and thermal shutdown. The
TPS92641 device includes a shunt FET dimming
input and MOSFET driver for high resolution PWM
dimming.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS92640
HTSSOP (14)
4.40 mm × 5.00 mm
TPS92641
HTSSOP (16)
4.40 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
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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