LCS7260C datasheet(4/35 Pages) POWERINT

4 / 35 page

Rev. D 11/22

HiperLCS-2

www.power.com

NC 13

12 GSA

FL 14

11 D1

5VL 15

10 D2

9 G1

GP 16-19

NC 24

8 G2

7 BPS

6 PS

5 FB

4 CMP

3 IS

2 GSB

1 5VS

PI-8893-031721

Figure 8. HiperLCS-2 Safety Isolation and Secondary-Side LSR2000C,

InSOP-24D (Top View).

Pin Functional Description – Safety Isolation and

Secondary-Side Device LSR2000C

SECONDARY 5 V (5VS) (Pin 1)

Connection point for an external decoupling capacitor for the

secondary IC supply. Should be capacitively decoupled to secondary

ground (GSB).

SECONDARY GROUND (GSB) (Pin 2)

Small signal ground for secondary-side (5VS, IS, CMP, FB, PS).

WINDING SENSE (IS) (Pin 3)

Secondary-side, small signal current input connection to an external

resistor and capacitor.

COMPENSATION (CMP) (Pin 4)

Secondary-side, small signal connection to external frequency

compensation resistor capacitor network.

FEEDBACK (FB) (Pin 5)

Secondary-side, small signal feedback signal to secondary control.

PROGRAM SECONDARY (PS) (Pin 6)

Secondary-side, small signal connection for customer configuration

selection components. This pin also outputs logic level fault code

during fault conditions.

SECONDARY BYPASS (BPS) (Pin 7)

Secondary-side power supply pin for secondary device.

SR GATE2 DRIVE (G2) (Pin 8)

Secondary-side, output for driving secondary synchronous rectifier

(SR) MOSFET for first output phase.

SR GATE1 DRIVE (G1) (Pin 9)

Secondray-side, output for driving secondary synchronous rectifier

(SR) MOSFET for second output phase.

SR DRAIN2 SENSE (D2) (Pin 10)

Secondary-side, medium voltage small signal input for sensing

SR DRAIN/SOURCE voltage.

SR DRAIN1 SENSE (D1) (Pin 11)

Secondary-side, medium voltage small signal input for sensing SR

DRAIN/SOURCE voltage.

SECONDARY GROUND (GSA) (Pin 12)

Power ground for secondary-side (BPS, G1, G2, D1, D2).

NO CONNECT (NC) (Pin 13)

No connection. Leave open.

FLUXLINK (FL) (Pin 14)

Primary-side small signal output is the FluxLink primary output pin.

PRIMARY 5V (5VL) (Pin 15)

Primary-side connection point for an external primary decoupling

capacitor for the primary IC supply. Should be capacitively decoupled

to primary ground (GP).

PRIMARY GROUND (GP) (Pins 16-19)

Primary-side ground reference for primary BYPASS pin.

NO CONNECT (NC) (Pin 24)

No connection. Leave open.

Figure 9. HiperLCS2–SR, Safety Isolation Package.

InSOP-24D Top View, InSOP-24D Bottom View.

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