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dc2024afa

DEMO MANUAL DC2024A

Quick start proceDure

Table 4. Jumpers

NOMENCLATURE

JUMPER

DESCRIPTION

CLK: INT, EXT

JP1

Internal/External Clock Select

ON: INTVCC, FLOAT, GND

JP2

ON Input Select, VCC, Float (External), GND

ADR0: H, NC, L

JP3

Address Pin ADRO Select

ADR1: H, NC, L

JP4

Address Pin ADR1 Select

ADR2: H, NC, L

JP5

Address Pin ADR2 Select

WRITE PROTECT: LOCK, WRITE

JP6

Write Protect for EEPROM

Operating Principles

The LTC4282 is a low voltage, high current Hot Swap

controller that has a 2.9V to 33V operating range and

a 45V absolute maximum voltage for the VDD pin. This

demo circuit is populated for 12V operation, but it can

easily be readjusted for any voltage between 2.9V and 30V

by replacing R1, R2, and R7 (top resistors in the UV/OV

divider and the FB divider). The DC2024A as supplied by

the factory is populated with a pair of PSMN1R5-30BLE

MOSFETs in D2PAK packages. A total of ten 3mΩ sense

resistors are used providing typically 100A of load cur-

rent. The current limit and circuit breaker thresholds can

be adjusted by changing the sense resistors R25, R30,

R35, R41, R47, R52, R57, R62, R67, and R72 and/or the

valueof∆VSENSEviaaddressableregistersintheLTC4282.

SeverallocationsforMOSFETpackagesaswellasadditional

sense resistors are available on the front and rear of the

PCB for higher current configurations.

Quick Start Procedure (Without Software)

DC2024A is easy to set up to evaluate the performance of

the LTC4282. Refer to Figure 1 for proper measurement

equipment setup and follow the procedure below.

WARNING

The DC2024A is capable of operation in excess of 100A.

At this current and power level, there is a danger of seri-

ous personal injury and equipment damage if proper

techniques are not used. All cabling between the power

supply and the load should be capable of handling the

current levels used.

Additionally, the high currents and fast transients can

cause unexpected voltage drops in cables connecting the

test equipment to the DC2024A due to parasitic resistance

and inductance. The cable drops may cause ground loops

for the current via various cables and scope probes. This

will cause unexplained ringing, distorted oscilloscope

waveforms, voltage and current spikes, and signals ap-

pearing to be below ground.

Table 5. Conectors

NOMENCLATURE

CONNECTOR

DESCRIPTION

DC590

Connection for DC590 Aux Demo Board

DC1613

Connection for DC1613 Aux Demo Board

Table 3. LED Indicators

SOCKET POWER ON

D4 (Red)

Programming Socket SKT1 Powered

ALERT

D5 (Red)

ALERT Pin Logic Low

SCL

D6 (Green)

Serial Clock Active

SDA

D7 (Green)

Serial Data Active

GPIO3

D8 (Green)

GPIO3 Logic Low

GPIO2

D9 (Green)

GPIO2 Logic Low

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