NCP1095

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2

Figure 1. Pin-out NCP1095 in 16-pin TSSOP (Top View)

9

13

14

15

16

NCL

LCF

PGO

NCM

12

11

10

PSNS

RTN

PGATE

GBR

8

5

6

7

1

2

3

4

VPP

COSC

CLA

CLB

VPN

AUX

DET

ACS

NCP1095

PIN DESCRIPTION

Signal Name

Pin No.

Type

Description

VPP

1

Power

Positive input power.

Connect to the positive terminal of the rectifier bridge

CLA

2

Output

Connect a class signature programming resistor to VPN.

See classification section for recommended values

CLB

3

Output

AUX

4

Input

Auxiliary supply detection input. Referenced to VPN

COSC

5

Analog

Connect a 1 nF capacitor between COSC and VPN.

This pin is pulled to VPP during the detection phase

ACS

6

Input

Autoclass enable/disable input.

Pull to VPN to disable Autoclass; leave floating to enable Autoclass

DET

7

Output

Connect a 26.1 kW detection resistor between DET and COSC.

This pin is pulled to VPN during the detection phase

VPN

8

Power,

Ground

Negative input power.

Connect to the negative terminal of the rectifier bridge

PSNS

9

Input

Positive current sense line.

Connect to the positive side of the external sense resistor

(and the source of the external pass transistor)

PGATE

10

Output

Gate driver for the external pass transistor

GBR

11

Output,

Open Drain

Control output to disable the active rectifier bridge.

This pin is referenced to VPN

RTN

12

Power

DC/DC controller power return. Connect to the drain of the external pass

transistor

LCF

13

Output,

Open Drain

Long Classification Finger Indicator. This pin is referenced to RTN.

Connect with a pull-up resistor to the logic supply

PGO

14

Output,

Open Drain

Power Good Indicator. This pin is left floating when the power good signal is

active. Referenced to RTN. Must be used to enable/disable the main DC/DC

converter adjacent to NCP1095.

NCM

15

Output,

Open Drain

Class result MSB output. This pin is referenced to RTN.

Connect with a pull-up resistor to the logic supply

NCL

16

Output,

Open Drain

Class result LSB output. This pin is referenced to RTN.

Connect with a pull-up resistor to the logic supply