Rainbow-electronics MAX17117 Bedienungsanleitung PDF herunterladen (Seite 9)

Internal-Switch Boost Regulator with Integrated

7-Channel Scan Driver, Op Amp, and LDO

MAX17117

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Pin Configuration

Pin Description

MAX17117

THIN QFN

TOP VIEW

CK4

CK2

CK1

CK6

CK5

COMP

POS

OUT

GHON

4 5 6 7

2324 22 20 19 18

LDOO

LDOADJ

CKH2

CKH3

CKH4

CKH5

CK3

OPAS

DTS

CKH6

VGLC

ENA

CKH1

STH

VGL

PGND

PIN NAME FUNCTION

1–5, 7

CK5–CK1,

CK6

Level-Shifter Logic-Level Inputs

6 ST Start-Pulse, Level-Shifter Logic-Level Input

8 RE Gate-Shading Discharge for CKH2, CKH4, and CKH6

9 VGLC VGL Voltage Output

10–15 CKH6–CKH1 Level-Shifter Outputs

16 STH Start-Pulse Level-Shifter Output

17 VGL

Gate-Off Supply. VGL is the negative supply voltage for the STH, CKH1–CKH6, and VGLC high-volt-

age driver outputs. Bypass to PGND with a minimum of 0.1FF ceramic capacitor.

18 GHON

Gate-On Supply. GHON is the positive supply voltage for the STH, CKH1–CKH6, and VGLC high-

voltage scan-driver outputs. Bypass to PGND with a minimum of 0.1FF ceramic capacitor.

19 RO Gate-Shading Discharge for CKH1, CKH3, and CKH5

20 OUT Operational Amplifier Output

21 POS Operational Amplifier Noninverting Input

22 OPAS

Operational Amplifier Supply Input. Connect to V

MAIN

(Figure 1) and bypass to AGND with a 0.1FF or

greater ceramic capacitor.

23 COMP

Compensation for Error Amplifier. Connect a series RC from this pin to AGND. Typical values are

56kI and 1000pF.

24 FB

Step-Up Regulator Feedback. Reference voltage is 1.24V nominal. Connect the midpoint of an exter-

nal resistor-divider to FB and minimize trace area. Set V

MAIN

according to V

MAIN

= 1.24V (1 + R1/R2).

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 21 22

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