ISL97653A Просмотр технического описания (PDF) - Intersil

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ISL97653A

5-Channel Integrated LCD Supply

Intersil 

ISL97653A

Typical Performance Curves (Continued)

Ch1 = LXL (400ns/DIV)

Ch2 = ILXL (400ns/DIV)

Ch1 = LXL (400ns/DIV)

Ch2 = ILXL (400ns/DIV)

FIGURE 13. BOOST CURRENT LIMIT

FIGURE 14. BUCK CURRENT LIMIT

Pin Descriptions

PIN NUMBER

1

2

3, 4

5, 6

PIN NAME

DESCRIPTION

PVIN2

Logic buck supply voltage. This is also the analog supply from which the VL is generated. Needs at

least 1µF bypassing.

CB

Logic buck boot strap pin. Generate the gate drive voltage for the N-Channel MOSFET by connecting

a 1µF cap to the switching node LXL1, 2.

LXL1, LXL2 Logic buck switching node. Source of the high side internal power N-Channel MOSFET for the Buck.

PGND3, PGND4 Logic buck ground pin.

7

CM2

Buck compensation pin. An RC network is recommended. Increase R for better transient response at

the expense of stability.

8

FBL

Logic buck feedback pin. High impedance input to regulate at 1.215V.

9

VL

5.25V internal regulator output. Bypass with a 4.7µF capacitor. Ref voltage is generated from VL.

10

VREF

Reference voltage output. Bypass with a low valued capacitor for transients - recommend 220nF.

Should not be greater than 5 times CDEL capacitor to ensure correct start-up sequence.

11

FBN

Negative charge pump feedback pin. High impedance input to regulate to 0.203V.

12

SUPN

Negative charge pump supply voltage. Can be the same as or different from AVDD.

13

NOUT

Negative charge pump driver output.

14

PGND5

Charge pump ground pin.

15

C1P

Charge pump capacitor 1, positive connection.

16

C1N

Charge pump capacitor 1, negative connection.

17

C2P

Charge pump capacitor 2, positive connection.

18

C2N

Charge pump capacitor 2, negative connection.

19

SUPP

Positive charge pump supply. Can be the same as or different from AVDD.

20

FBP

Positive charge pump feedback pin. High impedance input to regulate at 1.215V

21

POUT

VON charge pump output.

22

COM

High voltage switch control output. VON slice output.

23

DRN

Lower reference voltage for VON slice output. Usually connected to AVDD.

24

CTL

Input control pin for VON slice output.

9

FN6367.3

September 7, 2010

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