Analog Devices EVAL-ADM8832 Manuale utente

Evaluation Board for Charge Pump

Regulator for Color TFT Panel

EVAL-ADM8832

Rev. 0

Evaluation boards are only intended for device evaluation and not for production purposes.

Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or

statutory including, but not limited to, any implied warranty of merchantability or fitness for a

particular purpose. No license is granted by implication or otherwise under any patents or other

intellectual property by application or use of evaluation boards. Information furnished by Analog

Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result

from its use. Analog Devices reserves the right to change devices or specifications at any time

without notice. Trademarks and registered trademarks are the property of their respective owners.

Evaluation boards are not authorized to be used in life support devices or systems.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 www.analog.com

FEATURES

Provides 3 output voltages (5.1 V,15.3 V, −10.2 V) from one

3 V input supply

Power efficiency optimized for use with TFT in mobile

phones

On-board socket for evaluation of multiple ICs

Shutdown line

Options to use external LDO

PACKAGE CONTENTS

ADM8832 evaluation board

ADP8832 evaluation board data sheet

ADM8832 data sheet

GENERAL DESCRIPTION

The ADM8832 evaluation board allows the ADM8832 TFT

color panel charge pump regulator to be quickly and easily

evaluated.

The evaluation board allows all of the input and output functions

to be exercised without the need for external components.

Full details about the part are available in the ADM8832 data

sheet, which should be consulted when using the EVAL-ADM8832.

FUNCTIONAL BLOCK DIAGRAM

07156-001

ADM8832 EVALZ

REV A

ADM8832

SOCKET

GND

LDO_IN GND

–10V

15V

LK8 LK7 LK9

LK1

LK2

LK4

LK5

LK6

LK3

LDO_ON/OFF SCAN/BLANK

SHDN

Figure 1.

EVAL-ADM8832

Rev. 0 | Page 2 of 8

TABLE OF CONTENTS

Features .............................................................................................. 1

Package Contents.............................................................................. 1

General Description......................................................................... 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 2

Evaluation Board Hardware............................................................ 3

Evaluation Board Connectors and Jumpers................................. 3

Setting Up the ADM8832 Evaluation Board .............................4

Evaluation Board Schematic ............................................................5

Ordering Information.......................................................................6

Bill of Materials..............................................................................6

Ordering Guide .............................................................................6

ESD Caution...................................................................................6

REVISION HISTORY

6/08—Revision 0: Initial Version

EVAL-ADM8832

Rev. 0 | Page 3 of 8

EVALUATION BOARD HARDWARE

The ADM8832 evaluation board contains the following main

components, which can be identified from the block diagram

and the schematic shown in Figure 1 and Figure 2, respectively:

•20-lead LFCSP socket to hold the ADM8832 IC

•9 jumper points to facilitate the connection of external

LDOs, clock sources, and external loads

•1 SMB connector for reliable logic signal connection

•9 test points for signal connection and measurement

•A large patchwork area to facilitate the addition of extra

components to the ADM8832 evaluation board

EVALUATION BOARD CONNECTORS AND JUMPERS

The function of the various connectors and jumpers on the

evaluation board is explained in Table 1, Table 2, and Table 3.

Table 1. Evaluation Board Power Connectors

Connector Function

J1 Supply to ADM8832 (3 V nominal)

J2 External Source (can be regulated by on-board LDO)

Table 2. SMB Connection

Jumper Pin Function Logic Level (High = 3 V, Low = 0 V)

SK1 CLKIN External clock used during blanking mode External

Table 3. Jumpers (Links)

Jumper Description

Default

Status

LK1 Connects to optional external 5 V loads (R1, R2, and R3).

LK1A Connects +5VOUT (Pin 4) to 620 Ω resistor (R1) to GND. (This generates a maximum scanning mode load current

of 8 mA.)

Removed

LK1B Connects +5VOUT (Pin 4) to 1 kΩ resistor (R2) to GND. (This generates a load current of 5 mA.) Removed

LK1C Connects +5VOUT (Pin 4) to 24.9 kΩ resistor (R3) to GND. (This generates a maximum blanking mode load current

of 200 μA.)

Removed

LK2A Connects VOUT (Pin2) to LDO_IN (Pin 3). Inserted

LK2B Connects external source (J2) to LDO_IN (Pin 3). Removed

LK3A Connects CLKIN (Pin 9) to VCC. Removed

LK3B Connects CLKIN (Pin 9) to GND. Removed

LK3C Connects CLKIN (Pin 9) to SK1. Inserted

LK4A Connects −10VOUT (Pin 17) to 100 kΩ resistor (R6) to GND. (This generates a max load current of 100 μA.) Inserted

LK4B Connects −10VOUT (Pin 17) to 1 MΩ resistor (R7) to GND. (This generates a min load current of 10 μA.) Inserted

LK4C Connects −10VOUT (Pin 17) to patchwork area. Inserted

LK5A Connects +15VOUT (Pin 10) to 150 kΩ resistor (R4) to GND. (This generates a maximum load current of 100 μA.) Inserted

LK5B Connects +15VOUT (Pin 10) to 1.5 MΩ resistor (R5) to GND. (This generates a minimum load current of 10 μA.) Inserted

LK5C Connects +15VOUT (Pin 10) to patchwork area. Inserted

LK6A Connects ADM8832 regulated +5VOUT (Pin 4) to +5VIN (Pin 5). (Input to the +15 V and −10 V charge pump stage.) Inserted

LK6B Connects externally regulated 5 V output to +5VIN (Pin 5). (Input to the +15 V and −10 V charge pump stage.) Removed

LK7A Connects VCC to LDO_ON/OFF (Pin 6). Inserted

LK7B Connects LDO_ON/OFF (Pin 6) to GND. Removed

LK8A Connects VCC to SHDN (Pin 7). Inserted

LK8B Connects SHDN (Pin 7) to GND. Removed

LK9A Connects VCC to SCAN/BLANK (Pin 8). Inserted

LK9B Connects SCAN/BLANK (Pin 8) to GND. Removed

EVAL-ADM8832

Rev. 0 | Page 4 of 8

SETTING UP THE ADM8832 EVALUATION BOARD

Scanning Mode

To set up the ADM8832 evaluation board in scanning mode,

use the following steps:

1. Connect the scanning mode load resistors.

2. +5VOUT—Connect R1 (insert LK1A, remove LK1C/LK1D)

3. +15VOUT—Connect R4 (insert LK5A )

4. −10VOUT—Connect R6 (insert LK4A )

Note that all other load resistors should be disconnected by

removing their links (see Table 3).

5. Connect VOUT to the ADM8832 LDO (insert LK2A,

remove LK2B).

6. Use 3.3 V logic levels for logic inputs.

7. Connect the following jumpers:

SHDN—Insert LK8A, remove LK8B

LDO_ON/OFF—Insert LK7A, remove LK7B

SCAN/BLANK—Insert LK9A, remove LK9B

8. CLKIN—Connect the SMB cable to SK1.

Note that an external clock is not required to be applied to

CLKIN (Pin 9) in this mode.

9. Apply a 3 V supply to J1.

Blanking Mode

To set up the ADM8832 evaluation board in blanking mode,

use the following steps:

1. Connect the blanking mode load resistors.

2. +5VOUT—Connect R3 (insert LK1C, remove LK3A/LK3B)

3. +15VOUT—Connect R5 (insert LK5B)

4. −10VOUT—Connect R7 (insert LK4B)

Note that all other load resistors should be disconnected by

removing their links (see Table 3).

5. Connect VOUT to the ADM8832 LDO (insert LK2A,

remove LK2B).

6. Use 3.3 V logic levels for logic inputs.

7. Connect the following jumpers:

SHDN—Insert LK8A, remove LK8B

LDO_ON/OFF—Insert LK7A, remove LK7B

SCAN/BLANK—Insert LK9B, remove LK9A (The signal

must be low for blanking mode.)

8. CLKIN—Connect the SMB cable to SK1.

Note that an external clock must be applied to CLKIN

(Pin 9) in this mode. The frequency of this clock is

nominally 1 kHz (refer to the ADM8832 data sheet for

more details).

9. Apply a 3 V supply to J1.

EVAL-ADM8832

Rev. 0 | Page 5 of 8

EVALUATION BOARD SCHEMATIC

07156-002

ADM8832ACP

LK4

R7 1M

LK5

R5 1.5M

LK3

SK1

LK9

LK1

24.9k

Figure 2. ADM8832 Evaluation Board Schematic

EVAL-ADM8832

Rev. 0 | Page 6 of 8

ORDERING INFORMATION

BILL OF MATERIALS

Table 4.

Qty Reference Designator Description Manufacturer Part Number

1 U1 20-lead LFCSP socket (ADM8832 inside) Loranger 03714-201-6217

2 J1, J2 Power connector, 5 mm pitch Weidmuller 1716120000

1 SK1 SMB connector Emerson SMB 131-3701-266

2 T1 to T2, Test point Vero 20-313137

7 T4 to T10 Test point Vero 20-313137

6 C2 to C4, C8 to C9 Capacitor, 1 μF, 50 V, 1206, X7R TDK C3216X7R1H105M

5 C1, C5 to C7 Capacitor, 2.2 μF, 25 V, 1206, X7R TDK C3216X5R1E225K

1 R1 Resistor, 620 Ω, 0805 1% Yageo RC0805FR-07620RL

1 R2 Resistor, 1 kΩ, 0805 1% Yageo RC0805FR-071KL

1 R3 Resistor, 24.9 kΩ, 0805 1% Yageo RC0805FR-0725KL

1 R4 Resistor, 150 kΩ, 0805 1% Yageo RC0805FR-07150L

1 R5 Resistor, 1.5 MΩ, 0805 1% Yageo RC0805FR-071M5L

1 R6 Resistor, 100 kΩ,0805 1% Yageo RC0805FR-07100KL

1 R7 Resistor, 1 M Ω, 0805 1% Yageo RC0805FR-071ML

ORDERING GUIDE

Model Description

ADM8832-EVALZ1Evaluation Board

1Z = RoHS Compliant Part.

ESD CAUTION

EVAL-ADM8832

Rev. 0 | Page 7 of 8

NOTES

EVAL-ADM8832

Rev. 0 | Page 8 of 8

NOTES

registered trademarks are the property of their respective owners.

EB07156-0-6/08(0)

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