Linear Technology LTC4231 Demo Manual
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Linear Technology LTC4231 Demo Manual

Micropower hot swap controller
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DESCRIPTION
Demonstration circuit 2161A showcases the
Micropower Hot Swap
Controller in a 12V, 3A applica-
™
tion. Included on the board are input overvoltage and
reverse voltage protection, input voltage dividers for UV
and OV detection, an output voltage LED, jumpers to
disable UV/OV, manual and remote enable control, and
quiescent current measurement. There are turrets provided
to monitor input voltage, output voltage, output status,
quiescent current, several ground connections, timer pin,
and control the ON pin. Input, output and return voltages
PERFORMANCE SUMMARY
Table 1
PARAMETER
Input Supply Voltage Range
Nominal Operating Voltage
Overvoltage Lockout
Undervoltage Lockout (Voltage Falling)
Undervoltage Lockout (Voltage Rising)
Output Current Limit
Maximum Load Capacitance
Timer Expiration Period
Table 2. Power Input and Output Connections
NOMENCLATURE
CONNECTOR
VIN 12V
GND
VOUT 12V, 3A
GND
LTC
4231
®
Specifications are at T
CONDITIONS
Limited by Transient Surge Protector
 
Nominal
Nominal
Nominal
 
 
 
DESCRIPTION
J1
12V Input
J2
12V Input Return
J3
12V Output
J4
12V Output Return
DEMO MANUAL DC2161A
LTC4231 Micropower
Hot Swap Controller
are provided on banana jacks. The DC2161A-A version is
used to demonstrate the LTC4231-1 which remains off
after a current fault, while the DC2161A-B demonstrates
the LTC4231-2 which automatically reapplies power after
a cool-down period.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2161A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of
their respective owners.
= 25°C
A
VALUE
–24V to +24V
12V
14.4V
9.6V
10.8V
3A
600µF
2ms
Table 3. Test Points
NOMENCLATURE
TURRET
VIN 12V
E1
GND
E2, E4,
E6, E8
VOUT 12V, 3A
E3
STATUS
E5
GND
E6
IQ
E7
ON
E9
TIMER
E10
DESCRIPTION
12V Input Monitor
Ground
12V Output Monitor
Status, Open Drain when Output
Enabled
Ground
Quiescent Current Monitor. Use
Microammeter at This Point When JP2
Selects MEASURE IQ.
Enable LTC4231 Output. Enables Output
or Selects External Control of Output
TIMER Pin
dc2161af
1

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Summary of Contents for Linear Technology LTC4231

  • Page 1 L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of and control the ON pin.

  • Page 2: Operating Principles

    ON pin is connected via a 100kΩ resistor from turret current of other components on the board, such as LED E9 to the ON pin of the LTC4231. A logic 1 on this pin will enable the 12V V .

  • Page 3: Quick Start Procedure

    The active load should be set to provide a resistive load with a 500µF capacitor. Observe the polarity when con- since the LTC4231 may not start into a constant current necting the capacitor. Upon application of input voltage, load. With the resistive load set at 5.4Ω, vary the input LED D2 should illuminate to indicate V is present.

  • Page 4: Parts List

    DEMO MANUAL DC2161A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP., X7R, 0.1µF 25V, 10%, 0603 MURATA, GRM188R71E104KA01D CAP., 0402 CAP., TANT, 100µF 25V, 20%, 7343 AVX, TAJE107M025RNJ CAP., X7R, 0.082µF 16V, 10%, 0402 MURATA, GRM155R71C823KA88D DIODE, SUPPRESSORS,600W, SMB-DIODE FAIRCHILD SEMI., SMBJ24CA LED, GREEN, LED-ROHM-SML-010 ROHM, SML-010FTT86...

  • Page 5: Schematic Diagram

    Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
  • Page 6 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.
  • Page 7 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC2161A-A DC2161A-B DC024A-C...

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