NCV8851BDBGEVB データシートの表示（PDF） - ON Semiconductor

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NCV8851BDBGEVB

NCV8851B Automotive Grade Synchronous Buck Controller Evaluation Board User's Manual

ON Semiconductor 

NCV8851BDBGEVB

VIN

VIN

12

EN

11

VIN_IC

3

ROSC

ROSC

20

SYNC

1

CC2

CCOMP

15

CC1

RC1

CFB

16

CSOUT

17

6VOUT

9

DBST

BST

4

Q1

GH

5

VSW

6

Q2

GL

7

PGND

8

+

VIN

−

CBST

RS

L

2 VIN_CS

CSP

19

CSN

18

VFB

13

CV2

VCOMP

RV1

14

CV1

10

AGND

+

C

VOUT

−

RF1

RF0

Figure 2. NCV8851B Application Diagram

Operational Guidelines

1. Connect a dc input voltage, 4.5 V ≤ VBATT ≤ 40 V,

between “VIN” and “GND”.

2. Connect a load impedance between “VOUT” and

“GND”.

3. Connect a dc enable voltage, 4.5 V ≤ EN ≤ VBATT

≤ 20 V, between “EN” and “GND”. If EN must be

tied to a higher voltage, a current limiting resistor

is required (see below).

V BATT

4. Optionally, for external clock synchronization,

connect a pulse source, SYNC, between “SYNC”

and “GND”. The positive amplitude should be

1.0 V ≤ SYNC ≤ 7.0 V and negative amplitude

should be -0.3 V ≤ GND ≤ 0.8 V. SYNC pulse

duty cycle may range from 10% to 90%, and

frequency may range from the programmed

frequency (170 kHz by default) to 600 kHz.

V OUT

SYNC

EN

Figure 3. Evaluation Board Connections

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3

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