DC1007C Datasheet DC1007C | P4-P6

dc1007cf

DEMO MANUAL DC1007C

APPLICATION INFORMATION

This demo circuit is designed to demonstrate the full

capability of the LTC4088 high efficiency battery charger.

Not all components are required in all applications. The

critical circuit components are on the top of the board

near the IC and listed in the Required Circuit Components

section of the Parts List

The input capacitor network of C7 and R13 is used to

dampen source lead inductances that commonly occur in

laboratory setups with twisted leads and a bench power

supply. When using an USB cable or adaptor cable this

input damping network will likely not be required. Please

note that the in-circuit capacitance of the specified 10µF,

0805 ceramic ceramic capacitor for C2 and C7 is approxi

mately 5µF each at a VBUS greater than 4.25V.

Capacitor C4 is only required when using the 10× mode.

The LTC4088 requires a minimum of 10µF on the OUT

pin in 10× mode for voltage loop stability. As an alterna

tive to using two smaller X5R capacitors, one larger X5R

ceramic capacitor would be acceptable, provided that the

actual in-circuit capacitance with 4.2V applied is greater

than 10µF.

Capacitor C5 is included to simulate a low impedance bat

tery. It is especially helpful when testing the demo circuit

with a battery simulator comprised of a standard power

supply with a 3.6Ω power resistor across it. The leads

connecting the power supply to the demo circuit should

be a twisted pair to minimize lead inductance; although,

even twisted pairs can introduce enough inductance into

the circuit to cause instability in the battery charger sec

tion without the presence of C5. Capacitor C5 will also

provide proper operation of the circuit without a battery

present. Refer to the data sheet for more discussion of

operation without a battery. If desired, it is possible to use

a ceramic capacitor in series with a low valued resistor to

stabilize the battery charger when no battery is present.

Please refer to the data sheet for the suggested capacitor

and resistance range.

When not using the 3.3V LDO (LDO3V3) connect VOUT

to LDO3V3 by installing R12 and removing C1.

dc1007cf

DEMO MANUAL DC1007C

Figure 1. Proper Measurement Equipment Setup for DC1007C

APPLICATION INFORMATION

dc1007cf

DEMO MANUAL DC1007C

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP, CHIP, X5R, 1.0µF, 6.3V, 0402 MURATA, GRM155R60J105ME19D

2 1 C2 CAP, CHIP, X5R, 10µF, 10V, 0805 MURATA, GRM21BR61A106KE19L

3 1 C3 CAP, CHIP, X5R, 22µF, 6.3V, 0805 MURATA, GRM21BR60J226ME39L

4 1 C6 CAP, CHIP, X7R, 0.1µF, 16V, 0402 MURATA, GRM155R71C104KA88D

5 1 L1 IND, 3.3µH, 0.08Ω, 2.2A COILCRAFT, LPS4018-332MRC

6 1 R5 RES, 0402 2.94k 1% 1/16W VISHAY, CRCW04022K94FKED

7 2 R6, R7 RES, 0402 2k 1% 1/16W VISHAY, CRCW04022K00FKED

8 1 R14 RES, 0402 8R 25Ω 1% 1/16W VISHAY, CRCW04028R25FNED

9 1 U1 IC, USB BAT CHARGER/POWER MANAGER, DFN-14 LTC4088EDE

Additional Demo Board Circuit Components

10 1 C4 CAP, CHIP, X5R, 22µF, 6.3V, 0805 MURATA, GRM155R60J105ME19D

11 1 C5 CAP, CHIP OS-CON, 100µF, 6.3V, B6 PANASONIC, 6SVPC100MY

12 1 C7 CAP, CHIP, X5R, 10µF, 10V, 0805 MURATA, GRM21BR61A106KE19L

13 1 D1 LED 565NM GRN DIFF 0603 SMD LUMEX OPTO/COMPONENTS INC,

SML-LX0603GW-TR

14 1 Q1 XSTR, MOSFET P-CHANNEL SILICONIX, Si2333DDS

15 2 R1, R2 RES, 0402, 100k, 1%, 1/16W VISHAY, CRCW0402100KFKED

16 4 R3, R4, R8, R9 RES, 0402 0R 0Ω 1/16W VISHAY CRCW04020000Z0ED

17 1 R10 RES, 0402 510Ω 1% 1/10W VISHAY CRCW0402 5100 1%

18 0 R11 (OPT) RES., OPTION, 0402 OPT

19 0 R12 (OPT) RES, 0402 0R 0Ω 1/16W VISHAY CRCW04020000Z0ED

20 1 R13 RES., 1Ω, 1%, 1/16W, 0402 VISHAY, CRCW04021R00FKED

Hardware: For Demo Board Only

21 1 J1 CONN, USB MINI-B TYCO 440247-1

22 6 E1, E2, E8, E9, E10, E11 TEST POINT, TURRET, 0.094", MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0

23 10 E3, E4, E5, E6, E7, E12, E13, E14,

E15, E16

TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0

24 4 JP1, JP2, JP3, JP4 HEADER, 3 PINS 2mm COMM 2802S-03G2

25 4 STANDOFFS KEYSTONE, 8831

P1-P3 P4-P6 P7-P8

DC1007C

Mfr. #:

Buy DC1007C

Manufacturer:

Analog Devices / Linear Technology

Description:

Power Management IC Development Tools LTC4088EDE Demo Board

Lifecycle:

New from this manufacturer.

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DC1007C