HTD1R5B-1200D SERIES
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vpr Power Your Critical Mission Today Models Available Input: 6 V to 20 V continuous, 30 V transient 1.2 W, dual outputs of ±5 V Temperature: 155 °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 HTD1R5B Series utilizes a boundary mode, peak current controlled flyback topology with primary side regulation. The flyback topology achieves high efficiency at low power levels, over a wide input voltage range. High temperature performance is guaranteed through qualification, component lot testing and analysis. The HTD Series has been characterized over the full operating temperature range from -55 °C to +155 °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 • Isolated • 1.2 W rated output power • Extended operation up to 1.5W • Wide input voltage range • Low noise • Undervoltage lockout • Short circuit protection • Soft start 1.2 HIGH TEMPERATURE CHARACTERIZATION • Guaranteed performance to 155 °C operating • Characterized to 185 °C 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 • DVCH 1.5 W output 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: vptsales@vptpower.com Web: www.vptpower.com

vpr Power Your Critical Mission Today O- Tcase = -55 °C to +155 °C, Vin = +12 V ± 5%, Pout = 1.2W1, Unless Otherwise Specified Parameter Conditions Min Typ Max Units 3. Time for output voltage to settle within 1% of steady-state value 4. Verified by qualification testing Sales Information Phone: (425) 353-3010 Fax: (425) 353-4030E-mail: vptsales@vptpower.com Web: www.vptpower.com 1 Half load at +Vout and half load at -Vout Up to 75% of the total power or current can be drawn either of the two

HTD1R5B-1200D Series 4.0 PERFORMANCE CURVES 4.1.1 HTD1R5B-1205D Efficiency (Typical, 185 °C) Sales Information E-mail: vptsales@vptpower.com

HTD1R5B-1200D Series 4.0 PERFORMANCE CURVES (CONTINUED) 4.2.1 HTD1R5B-1205D Output Voltage (Typical, 185 °C) 4.2.2 HTD1R5B-1205D Output Voltage (Typical, 155 °C) 4.2.3 HTD1R5B-1205D Output Voltage (Typical, 25 °C) 4.2.4 HTD1R5B-1205D Output Voltage (Typical, -55 °C) Sales Information E-mail: vptsales@vptpower.com

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: vptsales@vptpower.com Web: www.vptpower.com HTD1R5B-1200D - 2.0 Page 6

HTD1R5B-1200D 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 HTD1R5B-1200D Series is an isolated dual-output flyback converter. It provides a positive and negative output voltage with respect to the OUTCOM pin. Up to 75% of the total output power is available from either output. The internal voltage regulation loop actively regulates a primary referenced voltage. The secondary positive and negative outputs are regulated by...

HTD1R5B-1200D Series 6.3 PROTECTION FEATURES 6.3.1 Input Undervoltage Lockout The HTD1R5B-1200D Series provides input undervoltage lockout protection. For input voltages below the turn-on voltage, the converter will remain off, drawing minimal current from the source. When the input voltage exceeds the turn-on voltage, the converter will start. The lockout circuit is designed to tolerate slow ramping input voltage waveforms. 6.3.2 Output Soft Start The HTD1R5B-1200D Series utilizes an output soft-start function to ramp the output in a controlled manner, eliminating output voltage overshoot...

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. MIL-STD-883 Test Test Method, Condition High Temp Non-QML1 Non-Destructive Bond Pull Internal Visual Acceleration Direction MIL-PRF-38534, Group A Final Electrical Subgroups 1-6...

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: vptsales@vptpower.com Web: www.vptpower.com