K78xx-500R3 / DC-DC converter / 500mA current output / non-isolated / modular / low cost / high efficiency

Product catalog summary

Overview: The K78xx-500R3 series by MORNSUN is a range of high-efficiency DC/DC converters designed as substitutes for LM78xx linear regulators. These converters are non-isolated, regulated, and support both positive and negative outputs. They are suitable for industrial control, instrumentation, and electric power applications.

Key Features:

High efficiency up to 95%.
No-load input current as low as 0.2mA.
Operating temperature range from -40℃ to +85℃.
Output short circuit protection.
Pin-out compatibility with LM78XX linear regulators.
UL60950 and EN60950 approvals.

Specifications:

Input Voltage Range: 4.75-36 VDC depending on the model.
Output Voltage Options: 3.3V, 5V, 9V, 12V, 15V, and negative outputs.
Maximum Output Current: 500mA for positive outputs, varying for negative outputs.
Efficiency: Ranges from 80% to 95% depending on the model and load conditions.

Input and Output Specifications:

No-load input current is typically 0.2mA.
Output voltage accuracy ranges from ±2% to ±4%.
Line and load regulation are within ±0.4% to ±0.6%.
Ripple and noise are specified at 20mVp-p to 75mVp-p.
Output short circuit protection is continuous and self-recovering.

General and Physical Specifications:

Operating temperature requires derating above 71℃.
Storage temperature ranges from -55℃ to 125℃.
Switching frequency is between 550 KHz and 850 KHz.
MTBF is 2000 K hours at 25℃.
Casing is made of black flame-retardant plastic.
Dimensions: 11.60 x 7.55 x 10.16 mm; Weight: 1.8g.

EMC Specifications:

EMI compliance with CISPR22/EN55022 CLASS B.
EMS compliance with IEC/EN standards for electrostatic discharge, radiation immunity, EFT, and conducted disturbance immunity.

Design and Application Notes:

Typical application circuits are provided for both positive and negative outputs.
Recommended external components for EMC and ripple reduction are specified.
Capacitors and inductors are recommended for further ripple reduction.

Additional Information:

Specifications are subject to change without notice.
For detailed application notes, refer to the company's website.

Catalog excerpts

K78xx-500R3 / DC-DC converter / 500mA current output / non-isolated / modular / low cost / high efficiency-1

DC/DC Converter K78xx-500R3 Series Wide input voltage , non-isolated & regulated single High efficiency up to 95% No-load input current as low as 0.2mA Operating temperature range: -40℃ to +85℃ Support the negative output Output short circuit protection Pin-out compatible with LM78XX linear regulators UL60950,EN60950 approval K78xx-500R3 series are high efficiency switching regulators and ideal substitutes of LM78xx series three-terminal linear regulators. The product is featured with high efficiency, low loss, short circuit protection , support the negative output and no heat sink requirement. They are widely used in industrial control, instrumentation, and electric power applications. Selection Guide Certification Output Output Voltage (VDC) Efficiency (%/Typ.) (Min. Vin)/ (Max. Vin) @Full Load Note:For input voltage higher than 30 VDC, a 22uF/50V input capacitor is required. Input Specifications Item Operating Conditions No-load Input Current Positive output Reverse Polarity Input Input Filter Capacitor filter Output Specifications Item Operating Conditions Output Voltage Accuracy Full load, input voltage range Line Regulation Full load, input voltage range Load Regulation Ripple & Noise* Temperature Drift Coefficient Transient response deviation Transient recovery time Output short circuit protection 20MHz bandwidth, nominal input, 10% -100% load Nominal input, 25% load step change Nominal input Continuous, self-recovery Note: *1. Ripple and noise tested with “parallel cable” method, please refer to DC-DC Converter Application Notes for specific operation methods; *2.With the load lower than 10%, the maximum ripple and noise of 3.3V/5V output products will be 150mVp-p, 9V/12V/15V output products will be 2%Vo. MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyrigh

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K78xx-500R3 / DC-DC converter / 500mA current output / non-isolated / modular / low cost / high efficiency-2

DC/DC Converter General Specifications Positive output efficiency Vs input voltage (full loacD Positive output efficiency Vs output Input voltage(V) Output current percentage(%) MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO.,LTD. MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation

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K78xx-500R3 / DC-DC converter / 500mA current output / non-isolated / modular / low cost / high efficiency-3

DC/DC Converter Negative output efficiency Vs input voltage (full load) Input voltage(V) Negative output efficiency Vs output Output current percentage(%) Design Reference 1. Typical application circuit Positive output application circuit Negative output application circuit Fig. 2 Typical application circuit Positive output Fig. 4 "LC" filter application circuit Negative output MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO.,LTD. MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpreta

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K78xx-500R3 / DC-DC converter / 500mA current output / non-isolated / modular / low cost / high efficiency-4

DC/DC Converter 1. Packing information please refer to Product Packing Information. Packing bag number: 58200003; 2. The max. capacitive load should be tested within the input voltage range and under full load conditions; 3. Without any special statement, all indexes are only specific to positive output application; 4. Unless otherwise specified, data in this datasheet should be tested under the conditions of Ta=25°C, humidity<75% when inputting nominal voltage and outputting rated load; 5. All index testing methods in this datasheet are based on our Company's corporate standards; 6. The performance...

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