LM51770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
? Wide input range from 3.5V to 78V (85V absolute
maximum)
– Minimum 2.8V when V(BIAS) > 3.5V
? Output voltage from 3.3V to 78V
? Low shutdown IQ of 3μA
? Low operating IQ of 60μA
? 3% reverse current limit accuracy for precise
charging currents
? Average input and output current monitor or limiter
? Dynamic output voltage tracking for PWM or
analog input signals
? Power save mode (PSM) selectable for high light
load efficiency
? Two integrated high-voltage supply LDOs with
automatic selection
? Fixed frequency across all operating modes
(boost, buck-boost, buck)
– Forced PWM mode selectable
– Switching up to 1.8MHz for small solution and
component size
– External clock synchronization
? Spread spectrum operation selectable
? Adjustable undervoltage protection
? Hiccup overcurrent and short protection
2 Applications
? Non-isolated DC/DC supply (merchant DC/DC,
remote radio unit, motor drive control)
? Backup power systems (battery backup, fire
safety)
? Industrial PC (single board computer)
? Medical PSU (oxygen concentrator)
? Power over ethernet (router)
? Solar power (solar charge controller)
3 Description
The LM51770 is a four switch buck-boost controller.
The device provides a regulated output voltage if
the input voltage is higher, equal, or lower than
the adjusted output voltage. In power save mode,
the device supports high efficiency with low output
loads due to its low quiescence currents. In power
save mode, the device supports high efficiency
close to 99% efficiency over the full range of the
output currentThe LM51770 runs at a fixed switching
frequency, which can be set through the RT or SYNC
pin. The switching frequency remains the same during
buck, boost, and buck-boost operation. The integrated
and optional average current monitor can help monitor
and limit input and output current of the LM51770.
This feature also supports charging backup power
elements, like batteries or capacitors, with constant
current (CC) and constant voltage (CV).
| 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) |
23+ |
NA/ |
8735 |
原廠直銷,現(xiàn)貨供應(yīng),賬期支持! |
詢價(jià) | ||
TI |
22+ |
NA |
30000 |
原裝正品支持實(shí)單 |
詢價(jià) | ||
TI |
23+ |
WSON-8 |
2500 |
市場最低 原裝現(xiàn)貨 假一罰百 可開原型號(hào) |
詢價(jià) | ||
TI(德州儀器) |
22+ |
N/A |
6000 |
原廠原裝現(xiàn)貨訂貨價(jià)格優(yōu)勢終端BOM表可配單提供樣品 |
詢價(jià) | ||
6000 |
詢價(jià) | ||||||
TI/德州儀器 |
20+ |
WSON-8 |
5000 |
原廠原裝訂貨誠易通正品現(xiàn)貨會(huì)員認(rèn)證企業(yè) |
詢價(jià) | ||
TI德州儀器 |
23+ |
WSON8 |
7000 |
詢價(jià) | |||
TI德州儀器 |
22+ |
24000 |
原裝正品現(xiàn)貨,實(shí)單可談,量大價(jià)優(yōu) |
詢價(jià) | |||
TI德州儀器 |
23+ |
WSON8 |
8000 |
只做原裝現(xiàn)貨 |
詢價(jià) | ||
TI(德州儀器) |
10000 |
原裝正品現(xiàn)貨庫存價(jià)優(yōu) |
詢價(jià) |
