vpr Power Your Critical Mission Today O- TEMPERATURE HYBRID DC-DC CONVERTERS HTD1R5N-2800D SERIES Models Available Input: 14 V to 40 V continuous, 50 V transient 1.5 W, dual outputs of ±5 V, ±12 V, Non-Isolated Temperature: 185 °C operating 1.0 DESCRIPTION The HTD Series of high temperature DC-DC converters is specifically designed for extreme temperature environments. Hybrid microcircuit technology provides superior reliability in high temperature applications. Bare semiconductor die are integrated with passive components using thick film conductors on a ceramic substrate. A hermetic metal package protects internal components for long term reliability. The HTD1R5N Series utilizes a boundary mode, peak current controlled flyback topology. The flyback topology achieves high efficiency at low power levels, over a wide input voltage range. The main output is tightly regulated with a wide bandwidth, precision voltage control loop. High temperature performance is guaranteed through screening, product qualification, component lot testing and analysis. The HTD Series has been characterized over the full operating temperature range from -55 °C to +185 °C, including electrical performance, operating life, temperature cycling, mechanical shock and vibration. The HTD Series is intended for harsh environments including down-hole oil and gas, MWD/LWD and wireline logging tools, aircraft engine electronics, and other industrial applications. 1.1 FEATURES • Non-Isolated • 1.5 W rated output power • Wide input voltage range • Low noise • Undervoltage lockout • Short circuit protection • Soft start • Guaranteed performance to 185 °C operating 1.3 MANUFACTURING AND COMPLIANCE • Manufactured in a MIL-PRF-38534 Class H and Class K facility • MIL-STD-883 • ISO-9001 1.4 PACKAGING • Low-profile: 0.975” x 0.800” x 0.270” • Max weight: 11 g • Industry standard pinout • Precision projection-welded hermetic metal case 1.5 SIMILAR PRODUCTS AND ACCESSORIES • HTD1R5N-1200D 1.5 W non-output isolated DC-DC converter • HTD1R5B-1200D 1.5 W output isolated DC-DC converter • Custom versions available Sales Information Phone: (425) 353-3010 Fax: (425) 353-4030

vpr Power Your Critical Mission Today O- 3.0 SPECIFICATIONS 3.1 ABSOLUTE MAXIMUM RATINGS Sales Information Phone: (425) 353-3010 Fax: (425) 353-4030 E-mail: [email protected] Web: www.vptpower.com

HTD1R5N-2800D Series 3.2 PERFORMANCE SPECIFICATIONS Tcase = -55 °C to +185 °C, Vin = +28 V ± 5%, Pout = 1.5W1, Unless Otherwise Specified HTD1R5N-2805D Conditions5 INPUT Voltage Ripple Current5 Undervoltage Lockout OUTPUT STATIC Voltage +Vout, Tcase = 25 °C +Vout, Tcase = -55 °C to +185 °C -Vout, Tcase = 25 °C -Vout, Tcase = -55 °C to +185 °C Either Output Either Output 20 Hz to 10 MHz +Vout, VIN = 14 V to 40 V -Vout, VIN = 14 V to 40 V +Vout, No Load to Full Load -Vout, No Load to Full Load +Vout: 60% load, -Vout: 40% load +Vout: 40% load, -Vout: 60% load Delay Overshoot Output Inhibited Output...

HTD1R5N-2805D Output Voltage vs. Current HTD1R5N-2805D Output Voltage vs. Current Sales Information E-mail: [email protected]

Power Your Critical Mission Today O- Sales Information Phone: (425) 353-3010 E-mail: [email protected]

HTD1R5N-2800D Series 4.1 HTD1R5N-2812D PERFORMANCE CURVES (CONTINUED) 4.1.3 HTD1R5N-2812D Output Voltage vs. Current HTD1R5N-2812D Output Voltage vs. Current HTD1R5N-2812D Cross Regulation (Typical, 25 °C) Sales Information E-mail: [email protected]

vpr Power Your Critical Mission Today O- 1. Tolerances are +0.005” unless otherwise stated 2. Case temperature is measured on the center of the baseplate surface 3. Materials: Case (Steel, gold over nickel plated); Cover (Steel, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass) Sales Information Phone: (425) 353-3010 Fax: (425) 353-4030E-mail: [email protected] Web: www.vptpower.com HTD1R5N-2800D - 2.0 Page 7

HTD1R5N-2800D Series 6.0 TECHNICAL NOTES Please note that many of these functions are also demonstrated in detail on the VPT website in the form of technical video labs. 6.1 GENERAL INFORMATION 6.1.1 Topology Description The HTD1R5N-2800D Series is a non-isolated dual-output peak current controlled boundary mode flyback converter. It provides a positive and negative output voltage with respect to the COM pin. Up to 60% of the total output power is available from either output. The internal voltage regulation loop actively regulates the positive output voltage. The negative output is regulated...

HTD1R5N-2800D Series 6.3.3 Output Overcurrent Protection The HTD1R5N-2800D Series provides output short circuit protection. During a load fault condition, a peak current limiting function reduces the converter duty cycle and switching frequency to limit the total output current into the fault. The short circuit protection feature senses the transformer primary current. It does not distinguish if the fault is on the positive or negative output. The converter will continue to operate into any overload or short circuit condition. This feature allows the converter to start into any capacitive load....

vpr Power Your Critical Mission Today O- 7.0 ENVIRONMENTAL SCREENING 100% tested per MIL-STD-883 as referenced to MIL-PRF-38534. Contact sales for more information concerning additional environmental screening and testing options. VPT, Inc. reserves the right to ship higher screened or SMD products to meet orders for lower screening levels at our sole discretion unless specifically forbidden by customer contract. Non-Destructive Bond Pull Internal Visual Temperature Cycling Constant Acceleration Pre Burn-In Electrical MIL-PRF-38534, Group A Final Electrical Subgroups 1-6 -55 °C, 25 °C, 185 °C3...

vpr Power Your Critical Mission Today O- Product Nominal Input Output Voltage Number of Series Voltage Outputs Please contact your sales representative or the VPT, Inc. Sales Department for more information concerning additional environmental screening and testing, different input voltage, output voltage, power requirements, source inspection, and/or special element evaluation. Sales Information Phone: (425) 353-3010 Fax: (425) 353-4030 E-mail: [email protected] Web: www.vptpower.com