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rev. page page date date 1 of 3
11/2008
PART NUMBER: VASD1-DIP Series
DESCRIPTION: dc-dc converter
description
Designed to convert fixed voltages into an isolated regulated voltage, the VASD1-DIP series is well suited for providing boardmount local supplies in a wide range of applications, including mixed analog/digital circuits, test & measurement equip., process/machine controls, datacom/telecom fields, etc... The semi-regulated output can be followed by 3-terminal regulators to provide output protection, in addition to output regulation.
features
*isolated 1 W output *temperature range: -40C~+85C *unregulated *high efficiency to 80% *dual voltage output *small footprint *DIP package style *industry standard pinout *UL94-V0 package *no heatsink required *1K Vdc isolation *power density 0.85 W/cm *no external component required *low cost
MODEL
VASD1-S5-D5-DIP VASD1-S5-D9-DIP VASD1-S5-D12-DIP VASD1-S5-D15-DIP VASD1-S12-D5-DIP VASD1-S12-D9-DIP VASD1-S12-D12-DIP VASD1-S12-D15-DIP VASD1-S15-D5-DIP VASD1-S24-D5-DIP VASD1-S24-D9-DIP VASD1-S24-D12-DIP VASD1-S24-D15-DIP
input voltage nominal range (V dc) (V dc)
output voltage (V dc)
output current max. min. (mA) (mA)
efficiency typ. (%)
UL60950-1
5 5 5 5 12 12 12 12 15 24 24 24 24
4.5~5.5 4.5~5.5 4.5~5.5 4.5~5.5 10.8~13.2 10.8~13.2 10.8~13.2 10.8~13.2 13.5~16.5 21.6~26.4 21.6~26.4 21.6~26.4 21.6~26.4
5 9 12 15 5 9 12 15 5 5 9 12 15
100 56 42 33 100 56 42 33 100 100 56 42 33
10 6 5 4 10 6 5 4 10 10 6 5 4
72 77 79 80 72 78 79 78 72 73 79 80 80
YES YES YES YES YES YES YES YES NO YES YES YES YES
OUTPUT
parameter output power voltage accuracy ripple line regulation load regulation conditions/description refer to recommended circuit @ 20MHz Bandwidth 5/12/15V 24 V input voltage from low to high 10% to 100% full load 5V 9V 12V 15V refer to recommended circuit 100% load, nominal input min 0.1 nom 1 50 100 10.5 8.3 6.8 6.3 100 max 1 2 75 150 1.2 15 15 15 15 0.03 units W % mVpp mVpp % % % % % %/C kHz
temperature coefficient switching frequency
note: 1. All specifications measured at TA-25C, humidity <75%, normal input voltage and rated output load unless otherwise specified.
*V-Infinity reserves the right to make changes to its products or to discontinue any product or service without notice, and to advise customers to verify the most up-todate product information before placing orders. V-Infinity assumes no liability or responsibility for customer's applications using V-Infinity products other than repair or replacing (at V-I's option) V-Infinity products not meeting V-I's published specifications. Nothing will be covered outside of standard product warranty.
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382
page date
2 of 3
11/2008
PART NUMBER: VASD1-DIP Series
DESCRIPTION: dc-dc converter
GENERAL SPECIFICATIONS
parameter output short circuit protection temperature rise at full load cooling operating temp. range storage temp. range storage humidity range case material MTBF conditions/description <1 second 15C typ., 25C max. free air convection -40C ~ +85C -55C ~ +125C 95% plastic (UL94-V0) >3,500,000 hours
ISOLATION SPECIFICATIONS
parameter isolation voltage isolation resistance conditions/description flash tested for 1 minute test at 500 V dc min nom 1000 1000 max units V dc M
OUTLINE DIMENSIONS & RECOMMENDED LAYOUT PATTERN
TYPICAL CHARACTERISTICS
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382
page date
3 of 3
11/2008
PART NUMBER: VASD1-DIP Series
DESCRIPTION: dc-dc converter
APPLICATION NOTES:
- Requirement on output load To ensure this module can operate efficiently and reliably, the minimum output load should not be less than 10% of the full load. Also, this product should never be operated under no load conditions. If the actual output power is too small, please connect a resistor with proper resistance at the output end in parallel to increase the load. - Overload protection Under normal operating conditions, the output circuit of these products has no protection against overload. The simplest method is to connect a self-recovery fuse in series at the input end or to add a circuit breaker to the circuit. - Recommended circuit If you want to further decrease the input/output ripple, an "LC" filtering network may be connected to the input and output ends of the dc-dc converter, see (Figure 1).
- Output voltage regulation and over-voltage protection circuit The simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat protection that is connected to the input or output end in series (Figure 2).
FIGURE 2
No parallel connection or plug and play.
FIGURE 1
It should also be noted that the inductance and the frequency of the "LC" filtering network should be staggered with the dc-dc frequency to avoid mutual interference. However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a startup problem might arise. For every channel of output, provided that safe and reliable operation is ensured, the recommended capacitance of its filter capacitor see (Table 1).
TABLE 1
Vin (VDC) 5 12 15 24
Cin (uF)
4.7 2.2 2.2 1
Vout (VDC)
5 9 12 15
Cou (uF) 4.7 2.2 1 0.47
It is not recommended to connect any external capacitor in the application field with less than a 0.5 watt output.
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382

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