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LM51231-Q1中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

LM51231-Q1
廠商型號(hào)

LM51231-Q1

功能描述

LM51231-Q1 2.2-MHz Wide VIN Synchronous Boost Controller with VOUT Tracking

文件大小

2.03115 Mbytes

頁面數(shù)量

42

生產(chǎn)廠商 Texas Instruments
企業(yè)簡稱

TI德州儀器

中文名稱

美國德州儀器公司官網(wǎng)

原廠標(biāo)識(shí)
數(shù)據(jù)手冊(cè)

下載地址一下載地址二到原廠下載

更新時(shí)間

2025-2-17 10:03:00

LM51231-Q1規(guī)格書詳情

1 Features

? AEC-Q100 qualified for automotive applications

– Temperature grade 1: –40°C to +125°C, TA

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? Suited for wide operating range automotive battery

powered applications

– 3.8-V to 42-V input operating range

– Dynamically programmable VOUT from 5 V to

20 V, or from 15 V to 57 V

– Minimum boost input 0.8 V when BIAS ≥ 3.8 V

– Bypass operation when VSUPPLY > VLOAD

? BIAS shutdown current ≤ 3 μA

? Small solution size

– Maximum switching frequency 2.2 MHz

– Internal boot diode

– QFN-20 with wettable flanks

? EMI mitigation and avoid AM band interference

and crosstalk

– Optional clock synchronization

– Switching frequency from 100 kHz to 2.2 MHz

– Selectable switching mode (FPWM, diode

emulation)

– Optional programmable spread spectrum

– Lead-less package

? Programmability and flexibility

– Dynamic VOUT tracking

– Dynamic switching frequency programming

– Supports DCR inductor current sensing

– Programmable input voltage UVLO

– Adjustable soft start

– Adaptive dead-time

– PGOOD indicator

? Integrated protection features

– Constant cycle-by-cycle peak current limit over

VSUPPLY

– Overvoltage protection

– HB-SW short protection

– Thermal shutdown

2 Applications

? Automotive audio power supply with tracking

? Automotive LED bias supply

3 Description

The LM51231-Q1 device is a wide input range

synchronous boost controller that employs peak

current mode control. The device's wide input range

supports automotive cold-crank and load dump. The

minimum input voltage can be as low as 0.8 V

when BIAS is equal to or greater than 3.8 V. The

output voltage can be dynamically programmed by

using the tracking function. Bypass mode operation

is automatically entered when VSUPPLY > VLOAD,

eliminating the body diode drop of the high-side

MOSFET. The switching frequency is dynamically

programmed with an external resistor from 100 kHz

to 2.2 MHz. Switching at 2.2 MHz minimizes AM band

interference and allows a small solution size and fast

transient response.

The device has built-in protection features such as

peak current limit, which is constant over VSUPPLY,

overvoltage protection, and thermal shutdown.

External clock synchronization, programmable spread

spectrum modulation, and a lead-less package with

minimal parasitic, help to reduce EMI and avoid cross

talk. Additional features include line UVLO, FPWM,

diode emulation, DCR inductor current sensing,

programmable soft start, and a power-good indicator

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TI/德州儀器
2324+
NA
78920
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22+
VQFN20
6000
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TI(德州儀器)
23+
NA/
8735
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TI(德州儀器)
23+
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15000
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TI/德州
2022+
VQFN
10000
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專業(yè)鐵帽
CAN8
60
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TI
24+
VQFN-20
10000
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23+
VQFN20(3.5x3.5)
7350
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TI/德州儀器
23+
VQFN-20
8355
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TI
21+
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500000
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