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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
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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
供應(yīng)商 | 型號(hào) | 品牌 | 批號(hào) | 封裝 | 庫存 | 備注 | 價(jià)格 |
---|---|---|---|---|---|---|---|
TI/德州儀器 |
2324+ |
NA |
78920 |
二十余載金牌老企,研究所優(yōu)秀合供單位,您的原廠窗口 |
詢價(jià) | ||
22+ |
VQFN20 |
6000 |
原包裝原標(biāo)現(xiàn)貨,假一罰十, |
詢價(jià) | |||
TI(德州儀器) |
23+ |
NA/ |
8735 |
原廠直銷,現(xiàn)貨供應(yīng),賬期支持! |
詢價(jià) | ||
TI(德州儀器) |
23+ |
- |
15000 |
專業(yè)幫助客戶找貨 配單,誠信可靠! |
詢價(jià) | ||
TI/德州 |
2022+ |
VQFN |
10000 |
只做原裝,可提供樣品 |
詢價(jià) | ||
NSC/國半 |
專業(yè)鐵帽 |
CAN8 |
60 |
原裝鐵帽專營,代理渠道量大可訂貨 |
詢價(jià) | ||
TI |
24+ |
VQFN-20 |
10000 |
一級(jí)代理保證進(jìn)口原裝正品現(xiàn)貨假一罰十價(jià)格合理 |
詢價(jià) | ||
TI(德州儀器) |
23+ |
VQFN20(3.5x3.5) |
7350 |
現(xiàn)貨供應(yīng),當(dāng)天可交貨!免費(fèi)送樣,原廠技術(shù)支持!!! |
詢價(jià) | ||
TI/德州儀器 |
23+ |
VQFN-20 |
8355 |
只做原裝現(xiàn)貨/實(shí)單可談/支持含稅拆樣 |
詢價(jià) | ||
TI |
21+ |
原廠COC隨貨 |
500000 |
原裝正品 |
詢價(jià) |