Data Sheet
ATL010A0X43-SR Non Isolated Module 12Vdc, Programmable:
9 – 18Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current
April 1, 2008
Feature Description
Overtemperature Protection
Remote On/Off
To provide over temperature protection in a fault
The ATL010A0X43-SR power modules feature an On/Off
pin for remote On/Off operation. The ATL010A0X43-SR
modules feature positive on/off logic. Positive Logic
On/Off signal, turns the module ON during a logic High on
the On/Off pin and turns the module OFF during a logic
Low.
condition, the unit relies upon the thermal protection
feature of the controller IC. The unit will shutdown if the
thermal reference point Tref, exceeds 125oC (typical), but
the thermal shutdown is not intended as a guarantee that
the unit will survive temperatures beyond its rating. The
module will automatically restart after it cools down.
For positive logic modules, the circuit configuration for
using the On/Off pin is shown in Figure 27. The On/Off
pin is an open collector/drain logic input signal (Von/Off)
that is referenced to ground. During a logic-high (On/Off
pin is pulled high internal to the module) when the
transistor Q1 is in the Off state, the power module is ON.
Maximum allowable leakage current of the transistor
when Von/off = VIN,max is 10µA. Applying a logic-low
when the transistor Q1 is turned-On, the power module is
OFF. During this state VOn/Off must be less than 0.3V.
When not using positive logic On/off pin, leave the pin
unconnected or tie to VIN.
Output Voltage Programming
The output voltage of the ATL010A0X43-SR module can
be programmed to any voltage from 0.75Vdc to 5.0Vdc
by connecting a resistor (shown as Rtrim in Figure 28)
between Trim and GND pins of the module. Without an
external resistor between Trim and GND pins, the output
of the module will be 0.7525Vdc. To calculate the value
of the trim resistor, Rtrim for a desired output voltage, use
the following equation:
10500
⎡
⎤
Rtrim =
−1000 Ω
⎢
⎥
Vo − 0.7525
⎣
⎦
VIN+
MODULE
Rtrim is the external resistor in Ω
Vo is the desired output voltage
R2
ON/OFF
Q2
For example, to program the output voltage of the
ATL010A0X43-SR module to 1.8V, Rtrim is calculated as
follows:
+
R1
V
ON/OFF
I
ON/OFF
PWM Enable
10500
⎡
⎤
R3
R4
Rtrim =
−1000
⎢
⎣
⎥
⎦
1.8 − 0.75
Q1
Q3
CSS
Rtrim = 9.024kΩ
Vout
GND
_
VIN(+)
VO(+)
Figure 27. Remote On/Off Implementation.
ON/OFF
LOAD
TRIM
Overcurrent Protection
R
To provide protection in a fault (output overload)
condition, the unit is equipped with internal
trim
GND
current-limiting circuitry and can endure current limiting
continuously. At the point of current-limit inception, the
unit enters hiccup mode. The unit operates normally once
the output current is brought back into its specified range.
The typical average output current during hiccup is 3 A.
Figure 28. Circuit configuration for programming
output voltage using an external resistor.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout
limit, module operation is disabled. The module will begin
to operate at an input voltage above the undervoltage
lockout turn-on threshold.
LINEAGE POWER
12
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
