Datasheet > NCV97311MW50AR2G

NCV97311MW50AR2G

更新时间： 2024-09-24 02:52:47

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
17页	1663K
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NCV97311A Evaluation Board Users Manual

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NCV97311MW50AR2G 数据手册

NCV97311MW50AGEVB

NCV97311A Evaluation

Board User'sꢀManual

Description

The NCV97311A is 3−output regulator consisting of a low−Iq

battery−connected 3 A 2 MHz non−synchronous switcher and two

low−voltage 1.5 A 2 MHz synchronous switchers; all using integrated

power transistors.

The high−voltage switcher is capable of converting a 4.1 V to 18 V

battery input to a 5 V output at a constant 2 MHz switching frequency,

delivering up to 3 A. In overvoltage conditions up to 36 V, the

switching frequency folds back to 1 MHz; in load dump conditions up

to 45 V the regulator shuts down.

www.onsemi.com

EVAL BOARD USER’S MANUAL

The output of the battery−connected buck regulator serves as the low

voltage input for the 2 synchronous switchers. Each downstream output

is adjustable from 1.2 V to 3.3 V, with a 1.5 A current limit and

a constant 2 MHz switching frequency. Each switcher has

independent enable and reset pins, giving extra power management

flexibility.

For low−Iq operating mode the low−voltage switchers are disabled,

and the standby rail is supplied by a low−Iq LDO (up to 150 mA) with

a typical Iq of 30 mA. The LDO regulator is in parallel to the

high−voltage switcher, and is activated when the switcher is forced in

standby mode.

All 3 SMPS outputs use peak current mode control with internal

slope compensation, internally−set soft−start, battery undervoltage

lockout, battery overvoltage protection, cycle−by−cycle current

limiting, hiccup mode short−circuit protection and thermal shutdown.

An error flag is available for diagnostics.

Figure 1. Evaluation Board Photo

Key Features

• Low Quiescent Current in Standby Mode

• 2 Microcontroller Enabled Low Voltage Synchronous Buck

Converters

• Large Conversion Ratio of 18 V to 3.3 V Battery Connected

Switcher

• Wide Input of 4.1 to 45 V with Undervoltage Lockout (UVLO)

• Fixed Frequency Operation Adjustable from 2.0 to 2.6 MHz

• Internal 1.5 ms Soft−starts

• Cycle−by−cycle Current Limit Protections

• Hiccup Overcurrent Protections (OCP)

• Individual Reset Pins with Adjustable Delays

• These Devices are Pb−Free, Halogen Free/BFR Free

and are RoHS Compliant

Typical Applications

• Infotainment, Body Electronics, Telematics, ECU

Publication Order Number:

April, 2019 − Rev. 0

EVBUM2621/D

12 3 4 5 6 7...17

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