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Home » Offer Board » Auto Parts & Accessories » Car Electronics » Other Car Electronics » ITPS Car PC Power Supply

ITPS Car PC Power Supply

ITPS Car PC Power Supply
ITPS Car PC Power Supply
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Offer Type: Sell
Offer Post Time: Apr 23, 2012
Expiration Date: Jun 30, 2012
Details: 150W DC/DC POWER SUPPLY FOR CARPC

1. Function Description
DC/DC ATX power supply for automobile application, 6-32VDC input, +5V, +12V, +3.3V, -12V, +5VSB and PG (power good signal) outputs.

2. Operation Environment
Item Unit Minimum Typical Maximum Test Conditon
Temperature DIV> -20 50
RH %RH 40 90 No Condensation

3. Technique Requirement

3.1 Input Characteristic
Item Unit Minimum Typical Maximum Test Conditon
DC INPUT Vdc 6 24 32
Input Current A 6 30

3.2 Output Characteristic
3.2.1 Output Voltage Regulation
Output Min. Load Max. Load Peak Load Output Voltage range Ripple Pk-pkRated load 20MHz limit
+5V 0.5A 10A 4.75~5.25V 50mV
+12V 0.3A 6A 6A 11.40~12.60V 120mV
+3.3V 0.5A 10A 3.14~3.55V 50mV
-12V 0A 0.2A -11.0~-13.2V 120mV
+5VSB 0.1A 2A 3A 4.75~5.25V 100mV

Need to add 47 Tantalum capacitor and 0.1 high frequency capacitor on test point when testing.

3.2.2 Others Output Characteristics
Item Unit Minimum Typical Maximum Test Conditon
Output Power W 150 DC output power
Efficiency % 90 Rated load
Turn on Overshoot % 10
Rise Time ms 20 Output voltage up from 0% to 95% Rated load
Hold up Time ms 2 Rated load

3.3 EMC Requirement
Item Request Standard Judgement Grade
Conducted interference CLASS B, 3dB margin EN55022 Ensure system pass the CLASS B and have 3dB margin
Radiation interference CLASS B, 3dB margin EN55022 Ensure system pass the CLASS B and have 3dB margin

3.4 Protection Function
Item Unit Yes/No Minimum Typical Maximum Recovery Characteristic
Input invertion protection Yes
+5V OVP V Yes 5.8, 6.8 Latched, need to re-apply DC input to recovery
+12V OVP V Yes 13.2, 15.6 Latched
+3.3V OVP V Yes 3.9, 4.3 Latched
Short CircuitProtection +5V, +12V, +3. V Yes Lached

4 Monitoring, Signal Control
4.1 Process Sequence

Item Name Characteristic

1) Power good signal
The PG signal comes from the No. Pin8 of the 20pin output connector, it indicate the power supply working condition, this TTL Signal is the result of AND Relationship with DC output and DC input voltage. On working condition, if the DC input voltage is well within it'S operation range, then the PG signal is sent out (PG is in H logic) after 100-500ms delay. If the DC input voltage down and below to 11V, or the one of DC output voltage out of it'S normal range, then send out Power Fall signal (that is: PG is in L logic). The Power Fall signal fall to below 0.3V, should have 1ms (at least) before the +5V output down to 4.5V. And the PG signal'S slop during the rise up and fall down
Should be smooth and no any oscillation happened. PG signal should have the capacity to drive 6 standard TTL loading.

2) Sleeping mode control
(ON/OFF) The ON/OFF signal comes from the No. Pin14 of the 20pin output connector, is to control the power supplyS working state. (Be active in L Level). If the ON/OFF signal is in floating, the power supply will have no output (except 5VSB) and in sleeping mode. The 5VSB should be within the range of 4.75-5.25V under 1.5A loading condition, and no any audible noise can be heard. If the ON/OFF signal is shorted to ground, the power supply will be in normal working condition and have normal output voltage.

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