rev. description features 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... ·isolated 1 W output ·temperature range: -40°C~+85°C ·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/cm³ ·no external component required ·low cost MODEL input voltage nominal range (V dc) (V dc) 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 5 5 5 5 12 12 12 12 15 24 24 24 24 1 of 3 date date 11/2008 DESCRIPTION: dc-dc converter PART NUMBER: VASD1-DIP Series The semi-regulated output can be followed by 3-terminal regulators to provide output protection, in addition to output regulation. page page output voltage (V dc) 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 output current max. min. (mA) (mA) ±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 efficiency typ. (%) UL60950-1 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 temperature coefficient switching frequency 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 max 1 ±2 75 150 ±1.2 15 15 15 15 0.03 100 units W % mVpp mVpp % % % % % %/°C kHz note: 1. All specifications measured at TA-25°C, 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 2 of 3 date 11/2008 DESCRIPTION: dc-dc converter PART NUMBER: VASD1-DIP Series 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 15°C typ., 25°C max. free air convection -40°C ~ +85°C -55°C ~ +125°C ≤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 OUTLINE DIMENSIONS & RECOMMENDED LAYOUT PATTERN TYPICAL CHARACTERISTICS 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 units V dc MΩ page 3 of 3 date 11/2008 DESCRIPTION: dc-dc converter PART NUMBER: VASD1-DIP Series APPLICATION NOTES: - 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 - Requirement on output load To ensure this module can operate efficiently and reliably, overheat protection that is connected to the input or output the minimum output load should not be less than 10% of the end in series (Figure 2). full load. Also, this product should never be operated under no load conditions. If the actual output power is too small, FIGURE 2 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 No parallel connection or plug and play. 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). 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