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| Data Sheet October 1996 700B Power Module: Custom dc-dc Converter 5 Vdc Input; 24 V to 97 V Adjustable Output; 0.1 W Features s s s Small size/low profile: 0.40 in. x 1.9 in. x 2.0 in. Output voltage adjustable from 24 V to 97 V Temperature-dependent output: ~0.1% or ~0.2%/C with external thermistor Total regulation--0.20% maximum Complete input and output filtering Operating range 0 C to 75 C, natural convection Mountable on PC card s s s s Applications s s Fiber-optic telecommunications systems Avalanche photodiode biasing The 700B Power Module uses advanced, surface-mount technology and delivers high-quality, efficient, and compact dc-dc conversion. Description The 700B power module is an application-specific 0.1 W module designed to boost a nominal 5 V input into an output voltage adjustable from 24 V to 97 V. It is intended for reverse biasing of avalanche photodiodes. The module is unpotted to allow access to the DIP switch used for adjusting the output voltage. The output voltage is adjusted for setting an on-board dip switch. A thermistor can be externally added for temperature compensation of ~0.1% or ~0.2% per C. 700B Power Module: Custom dc-dc Converters; 5 Vdc Input; 24 V to 97 V Adjustable Output; 0.1 W Data Sheet October 1996 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Input Voltage I/O Operating Ambient Temperature (natural convection) Storage Temperature Symbol VI TA Tstg Min -- 0 -40 Max 7.0 75 100 Unit V C C Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Operating Input Voltage Maximum Input Current (VI = 5.25 V) Minimum Output Voltage Adjustment Range: With 3 k from Pin 4 to Ground With 3 k from Pin 5 to Ground Output Voltage Initial Set Point (switch resolution) Output Regulation Line, Load, and Temperature Variation after Switches are Set (fixed resistance from pin 4 or 5 to ground): Output Shift for Resistance from 3 k to 624.7 k*: At pin 4 At pin 5 Output Ripple and Noise Voltage: RMS Output Current Calculated Reliability (TA = 40 C) Symbol VI II, max VO VO -- -- Min 4.75 -- 24.0 23.4 -0.1 -0.2 Typ 5.0 -- -- -- -- -- Max 5.25 100 90.0 86.0 0.1 0.2 Unit V mA V V % % -- -- -- IO -- 7.6 3.8 -- 0 8.0 4.0 -- -- 2,000,000 8.4 4.2 180 1.1 % % mVrms mA MTBF *Normal thermistor resistance at 25 C and 65 C, respectively (Yellow Spring Instrument Co., part # YSI 44005). 2 Lucent Technologies Inc. Data Sheet October 1996 700B Power Module: Custom dc-dc Converters; 5 Vdc Input; 24 V to 97 V Adjustable Output; 0.1 W Pin 5 is intended to allow for a ~0.1% per C change in the output voltage when used with the specified thermistor. However, the exact value and accuracy of the output voltage is a function of the thermistor resistance, Rt. The following equation shows how to calculate the output voltage as a function of the thermistor resistance (Rt) and the equivalent resistance (Rb): Applications Information Output Voltage Adjustment The output voltage is adjusted using 12 switches in a DIP package. The switch settings are used to adjust the output voltage with a ladder network of precision resistors. The value of the resistances on the ladder network are R, 2R, 4R, 8R, 16R, up to 204.8K, where R is 100 . Figure 1 illustrates the ladder network. The value of Rb is the parallel value of all resistors with closed switches in series. 8.443k + Rt Rb VO = 76.67 x ------------------------------------- x ----------------------------- 6.978k + Rt 148 + Rb External Current Limit S1 100 S2 200 S12 204.8 k RB 8-1180(C) Figure 1. R2R Ladder Network Pin 4 is intended to allow for a ~0.2% per C change in the output voltage when used with the specified thermistor. However, the exact value and accuracy of the output voltage is a function of the thermistor resistance, Rt. The equation below shows how to calculate the output voltage as a function of the thermistor resistance (Rt) and the equivalent resistance (Rb): Rb VO = 76.67 x 5.789 k + Rt x ----------------------------------------------------------------4.324 k + Rt 148 + Rb The output of this module is not current limited, and protection against overloads is recommended. A 10 k --0.1 F R-C filter on the output has been used in some applications to minimize the possibility of overloads. This can also be used to filter output voltage overshoot seen at start-up. Lucent Technologies Inc. 3 700B Power Module: Custom dc-dc Converters; 5 Vdc Input; 24 V to 97 V Adjustable Output; 0.1 W Data Sheet October 1996 Outline Diagram Dimensions are in inches and (millimeters). Tolerances: x.xxx 0.020 in., x.xxx 0.010 in. Top View (I/O pins extend from bottom) 5 4 2.00 (50.8) 1.700 (43.2) 1 2 3 4 5 6 7 8 9 10 11 12 Pin 1 2 3 3 Description Vout Common Vin ~0.2% per C ~0.1% per C OUTPUT VOLTAGE LEVEL SELECTOR 1 2 4 5 0.15 (3.8) 0.15 (3.8) 1.000 (25.40) 1.600 (40.6) 1.90 (48.3) Side View Enlarged Side View SEE ENLARGED VIEW 0.40 (10.2) MAX 0.40 (10.2) MAX 0.055 (1.4) TYP 0.025 (0.64) x 0.025 (0.64) PIN 0.120 0.005 (3.05 0.13) 0.060 0.004 (1.52 0.10) 0.040 0.002 (1.02 0.05) 0.025 0.002 (0.64 0.05) 0.173 0.005 (4.39 0.13) ENLARGED VIEW 8-1181(C) 4 Lucent Technologies Inc. Data Sheet October 1996 700B Power Module: Custom dc-dc Converters; 5 Vdc Input; 24 V to 97 V Adjustable Output; 0.1 W Ordering Information For assistance in ordering options, plase contact your Lucent Technologies Account Manager or Application Engineer. Description 5V Output Voltage 24 V to 97 V Product Code 700B Comcode 105715965 Lucent Technologies Inc. 5 700B Power Module: Custom dc-dc Converters; 5 Vdc Input; 24 V to 97 V Adjustable Output; 0.1 W Data Sheet October 1996 Notes 6 Lucent Technologies Inc. Data Sheet October 1996 700B Power Module: Custom dc-dc Converters; 5 Vdc Input; 24 V to 97 V Adjustable Output; 0.1 W Notes Lucent Technologies Inc. 7 700B Power Module: Custom dc-dc Converters; 5 Vdc Input; 24 V to 97 V Adjustable Output; 0.1 W Data Sheet October 1996 For additional information, contact your Lucent Technologies Account Manager or the following: POWER SYSTEMS UNIT: Network Products Group, Lucent Technologies Inc., 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626, FAX +1-888-315-5182) (product-related questions or technical assistance) INTERNET: http://www.lucent.com/networks/power E-MAIL: techsupport@lucent.com ASIA PACIFIC: Lucent Technologies Singapore Pte. Ltd., 750D Chai Chee Road #07-06, Chai Chee Industrial Park, Singapore 469004 Tel. (65) 240 8041, FAX (65) 240 8438 CHINA: Lucent Technologies (China) Co. Ltd., SCITECH Place No. 22, Jian Guo Men Wai Avenue, Beijing 100004, PRC Tel. (86) 10-6522 5566 ext. 4187, FAX (86) 10-6512 3634 JAPAN: Lucent Technologies Japan Ltd., Mori Building No. 21, 4-33, Roppongi 1-Chome, Minato-ku, Tokyo 106-8508, Japan Tel. (81) 3 5561 5831, FAX (81) 3 5561 1616 LATIN AMERICA: Lucent Technologies Inc., Room 416, 2333 Ponce de Leon Blvd., Coral Gables, FL 33134, USA Tel. +1-305-569-4722, FAX +1-305-569-3820 EUROPE: Data Requests: DATALINE: Tel. (44) 7000 582 368, FAX (44) 1189 328 148 Technical Inquiries:GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Ascot), FRANCE: (33) 1 40 83 68 00 (Paris), SWEDEN: (46) 8 594 607 00 (Stockholm), FINLAND: (358) 9 4354 2800 (Helsinki), ITALY: (39) 02 6608131 (Milan), SPAIN: (34) 91 807 1441 (Madrid) Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. Copyright (c) 1996 Lucent Technologies Inc. All Rights Reserved Printed in U.S.A. October 1996 DS95-182EPS Printed On Recycled Paper |
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