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TPS92642-Q1 PDF预览

TPS92642-Q1

更新时间: 2024-11-26 15:18:59
品牌 Logo 应用领域
德州仪器 - TI 驱动驱动器红外LED
页数 文件大小 规格书
44页 2242K
描述
汽车类同步降压红外 LED 驱动器

TPS92642-Q1 数据手册

 浏览型号TPS92642-Q1的Datasheet PDF文件第2页浏览型号TPS92642-Q1的Datasheet PDF文件第3页浏览型号TPS92642-Q1的Datasheet PDF文件第4页浏览型号TPS92642-Q1的Datasheet PDF文件第5页浏览型号TPS92642-Q1的Datasheet PDF文件第6页浏览型号TPS92642-Q1的Datasheet PDF文件第7页 
TPS92642-Q1  
SLUSE50 – NOVEMBER 2023  
TPS92642-Q1 Automotive Synchronous Buck Infrared LED Driver  
LED current is achieved by directly modulating the  
UDIM input pin with desired duty cycle. The device  
incorporates an internal pulse monitoring circuit that  
limits the maximum pulse duty cycle.  
1 Features  
AEC-Q100 qualified for automotive applications  
– Grade 1: –40°C to 125°C ambient operating  
temperature  
The TPS92642-Q1 incorporates advanced diagnostic  
and fault protection featuring: cycle-by-cycle switch  
current limit, bootstrap undervoltage, LED open, LED  
short and thermal shutdown.  
– Device HBM classification level H1C  
– Device CDM classification level C5  
Functional Safety-Capable  
– Documentation available to aid functional safety  
system design  
Input voltage range: 5.5 V to 36 V  
– Operation down to 5.15 V after start-up  
Up to 5-A pulsed output current with 4% accuracy  
Adaptive on-time current control  
– Low offset high-side current sense amplifier  
– Stable with any combination of ceramic, and  
aluminum capacitors  
The TPS92642-Q1 is available in a 6.6-mm × 5.1-mm  
thermally-enhanced 16-pin HTSSOP package with  
0.65-mm lead pitch.  
Device Information  
PART NUMBER  
PACKAGE(1)  
BODY SIZE (NOM)  
TPS92642-Q1  
HTSSOP (16)  
6.60 mm × 5.10 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Programmable switching frequency from 100 kHz  
to 2.2 MHz  
Advanced dimming operation  
RCS  
L
LED+  
– 1000:1 precision PWM dimming  
– 15:1 precision analog dimming  
Internal maximum duty cycle limit  
Cycle-by-cycle switch overcurrent protection  
Open-drain fault indicator output  
– LED short circuit, open circuit and cable  
harness fault indication  
COUT  
1
2
16  
SW  
SW  
PGND  
GND  
VIN  
CIN1  
15  
14  
RBST  
CBST  
VIN  
VIN  
3
BST  
CVCC  
4
5
VCC  
IADJ  
RON  
RUV2  
RUV1  
13  
12  
11  
10  
9
RON  
UDIM  
CSP  
CSN  
FLT  
CCOMP  
Thermal shutdown protection  
6
7
COMP  
AGND  
PWM  
2 Applications  
CPLMT  
8
PLMT  
Driver Monitoring Systems (DMS)  
IR LED and laser driver  
3 Description  
Typical Buck LED Driver Application Schematic  
The TPS92642-Q1 is a monolithic, synchronous Buck  
LED driver with a wide 5.5-V to 36-V operating  
input voltage range and 40-V tolerance that supports  
load dump for duration of 400 ms. The TPS92642-  
Q1 implements an adaptive on-time average current  
mode control based on inductor valley current  
detection. The adaptive on-time control provides  
near constant switching frequency that can be set  
between 100 kHz and 2.2 MHz. Inductor current  
sensing and closed-loop feedback enables better than  
±4% accuracy over wide input, output and ambient  
temperature.  
LED Pulse Limit  
The high-performance infrared LED driver can  
independently modulate LED current using both  
analog or PWM dimming techniques. Linear analog  
dimming range with over 15:1 range is obtained  
by setting the IADJ voltage. PWM dimming of  
Ch1: UDIM input  
Ch2: PLMT voltage Ch4: LED current  
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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