HC010A0F1-S datasheet(9/19 Pages) LINEAGEPOWER

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Data Sheet

May 16, 2008

HC006/010 Series DC-DC Power Module:

18-36Vdc Input; 3.3V & 5Vdc Output; 6.6A - 10A Output Current

LINEAGE POWER

Feature Description

Remote On/Off

Two remote on/off options are available. Positive logic

turns the module on during a logic high voltage on the

ON/OFF pin, and off during a logic low. Negative logic

remote On/Off, device code suffix “1”, turns the module

off during a logic high and on during a logic low.

ON/OFF

VIN(+)

VIN(-)

Ion/off

Von/off

COM

Figure 16. Remote On/Off Implementation.

To turn the power module on and off, the user must

supply a switch (open collector or equivalent) to control

the voltage (Von/off) between the ON/OFF terminal and

the VIN(-) terminal. Logic low is –0.7V ≤ Von/off ≤ 1.2V.

The maximum Ion/off during a logic low is 1mA, the switch

should be maintain a logic low level whilst sinking this

current.

During a logic high, the maximum Von/off generated by

the module is 15V, and the maximum allowable leakage

current at Von/off = 15V is 50μA.

If not using the remote on/off feature:

For positive logic, leave the ON/OFF pin open.

For negative logic, short the ON/OFF pin to VIN(-).

Overcurrent Protection

To provide protection in a fault (output overload) condi-

tion, the module is equipped with internal current-limiting

circuitry, and can endure current limiting continuously.

At the instance of current-limit inception, the output

current begins to tail-out. When an overcurrent condition

exists beyond a few seconds, the module enters a

“hiccup” mode of operation, whereby it shuts down and

automatically attempts to restart upon cooling. While the

fault condition exists, the module will remain in this

hiccup mode, and can remain in this mode until the fault

is cleared. The unit operates normally once the output

current is reduced back into its specified range.

Input Undervoltage Lockout

At input voltages below the input undervoltage lockout

limit, the module operation is disabled. The module will

begin to operate at an input voltage above the

undervoltage lockout turn-on threshold.

Over Voltage Protection

The output overvoltage protection clamp consists of

control circuitry, independent of the primary regulation

loop, that monitors the voltage on the output terminals.

This control loop has a higher voltage set point than the

primary loop (See the overvoltage clamp values in the

Feature Specifications Table). In a fault condition, the

overvoltage clamp ensures that the output voltage does

not exceed Vo,ovsd, max. This provides a redundant

voltage-control that reduces the risk of output

overvoltage.

Over Temperature Protection

To provide protection in a fault condition, the unit is

equipped with a thermal shutdown circuit. The unit will

shutdown if the overtemperature threshold of 125

oC is

exceeded at the thermal reference point Tref . Once the

unit goes into thermal shutdown it will then wait to cool

before attempting to restart.

Output Voltage Programming

Trimming allows the output voltage set point to be

increased or decreased, this is accomplished by

connecting an external resistor between the TRIM pin

and either the VO(+) pin or the VO(-) pin (COM pin) .

VO(+)

VOTRIM

COM

Rtrim-down

LOAD

VIN(+)

ON/OFF

VIN(-)

Rtrim-up

Figure 17. Circuit Configuration to Trim Output

Voltage.

Connecting an external resistor (Rtrim-down) between the

TRIM pin and the COM pin decreases the output voltage

set point. The following equation determines the value

of trim-down resistor needed to decrease the output

voltage from Vo,set to Vo:

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