LT1947 LINER [Linear Technology], LT1947 Datasheet
LT1947
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LT1947 Summary of contents
Page 1
... C4 0. CERAMIC 0. 200mA D1 R1 SW1 C2 53.6k 3.3 F FB1 CERAMIC 2 R2 10k 24V ON 10mA GND T 1947 F01 LT1947 U ’s final value to the rising edge at DD Start-Up Waveforms V SHDN 5V/DIV V ON 20V/DIV AV DD 10V/DIV V OFF 10V/DIV 2ms/DIV 1947 TA01.tif 1947f 1 ...
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... SHDN Pin Low Shutdown Mode Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT1947 is guaranteed to meet performance specifications from Specifications over the – operating 2 U PACKAGE/ORDER I FOR ATIO ...
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... TEMPERATURE ( C) 1947 G05 SW1 Maximum Duty Cycle 100 –50 – 100 TEMPERATURE ( C) 1947 G08 LT1947 C Current Source T –2 –4 –6 –8 –10 –50 – 100 TEMPERATURE ( C) 1947 G03 Switch 1 Saturation Voltage 500 400 ...
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... LT1947 CTIO S FB1 (Pin 1): Feedback Pin for First Switcher. Connect resistor divider tap here. Set 1.26V(1 + R1/R2). DD FB2 (Pin 2): Feedback Pin for Second Switcher. Connect resistor divider 2 here and set 1.26V (1 + R3/R4) – 160mV (Pin 3): Timing Capacitor Pin. Connect a 10nF capacitor ...
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... U OPERATIO To best understand operation of the LT1947, please refer to the LT1947 Block Diagram. The device contains two switching regulators, a timer and a high side switch. Three outputs can be generated: an adjustable AV charge-pumped inversion of the AV and a time delayed adjustable output called V V off for an externally set time interval, set by a capacitor ...
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... D1: MBRM120LT3 D2: CMDSH-3 D3, D4: BAT54S DUAL DIODE L1: SUMIDA CLQ4D103R3 L2: TAIYO YUDEN LB2012B4R7M TFT-LCD Bias Generator: 10V, 24V, – 6V Output BAT54S SW1 IN SW2 FB1 D2 V LT1947 O2 R3 182k C3 FB2 V ON 220nF R4 SHDN C GND T 10k C5 10nF D1: MBRM120 D2: CMDSH-3 L1: SUMIDA CLQ4DI03R3 L2: TAIYO YUDEN LB2012B-4R7M ...
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... BSC 4.88 0.10 DETAIL “A” (.192 .004) 0.254 (.010) 0 – 6 TYP 0.53 0.01 (.021 .006) 1.10 (.043) DETAIL “A” MAX SEATING PLANE 0.17 – 0.27 (.007 – .011) LT1947 34k V OFF –6V Q1 20mA Q2 34k 12V 120mA R1 C2 86.6k 3.3 F CERAMIC 2 R2 10k ...
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... V = 0. www.linear.com L1 3 7.5V 200mA 4 SW1 C2 IN 49.9k 3.3 F SW2 FB1 CERAMIC LT1947 O2 10k R3 105k FB2 V 15V ON 0. 10mA SHDN C GND T 10k C5 10nF D1: MBRM120 1947 TA03 D2: CMDSH-3 D7: MMBZ5240 10V ZENER L1: SUMIDA CLQ4D103R3 L2: TAIYO YUDEN LB2012B-4R7M Q1: MMBT3906 PNP ...