L4962 STMicroelectronics, L4962 Datasheet
L4962
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L4962 Summary of contents
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... BLOCK DIAGRAM June 2000 1.5A POWER SWITCHING REGULATOR POWERDIP ( ORDERING NUMBERS : L4962/A ( Powerdip) The L4962 is mounted in a 16-lead Powerdip plastic package and Heptawatt package and requires very few external components. Efficient operation at switching frequencies up to 150KHz allows a reduction in the size and cost of external filter components ...
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... L4962 ABSOLUTE MAXIMUM RATINGS Symbol V Input voltage Input to output voltage difference Negative output DC voltage 2 Output peak voltage 0 100KHz Voltage at pin 11 Voltage at pin Pin 11 sink current 11 I Pin 14 source current 14 Power dissipation tot Junction and storage temperature j stg PIN CONNECTION (Top view) ...
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... 0.5A to 1.5A o ref 46V 125 1. 46V 36V o ref 46V 36V o ref V = 46V; output short-circuit 100KHz ref 12V rms = 100Hz fripple ref FUNCTION = 35V, unless otherwise j i Min. Typ. Max ref 5.1 5.2 0.4 1.5 1 L4962 Unit mV 3/16 ...
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... L4962 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter DYNAMIC CHARACTERISTICS (cont’d) f Switching frequency f Voltage stability of switching frequency Temperature stability of switching frequency Maximum operating max switching frequency T Thermal shutdown sd junction temperature DC CHARACTERISTICS I Quiescent drain current 7Q -I Output leakage current 2L SOFT START I Source current ...
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... CIRCUIT OPERATION (refer to the block diagram) The L4962 is a monolithic stepdown switching regu- lator providing output voltages from 5.1V to 40V and delivering 1.5A. The regulation loop consists of a sawtooth oscilla- tor, error amplifier, comparator and the output stage. An error signal is produced by comparing the output voltage with a precise 5 ...
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... L4962 Figure 3. Test and application circuit (Powerdip BYW98 or 3A Schottky diode, 45V of VRRM CORE TYPE - MAGNETICS 58120 - A2 MPP 1 N TURNS 45, WIRE GAUGE: 0.8mm (20 AWG Figure 4. Quiescent drain current vs. supply voltage (0% duty cycle) 6/16 : ROE, EKR 220 F 40V 7 Figure 5. Quiescent drain current vs. supply voltage (100% duty cycle) Figure 6 ...
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... R2 (see test circuit) Figure 8. Reference voltage (pin 10) vs. V rdip) vs Figure 11. Switching fre- quency vs. input voltage Figure 14. Line transient response L4962 Figure 9. Reference voltage (pin 10 ) vs. junction tem- perature Figure 12. Switching fre- quency vs. junction tem- perature Figure 15. Load transient response 7/16 ...
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... L4962 Figure 16. Supply voltage ripple rejection vs. frequency Fig ure 19. Effi ciency vs. output current F igu re 22. Effi ciency vs. output voltage 8/16 Figure 17. Dropout voltage between pin 7 and pin 2 vs. current at pin 2 Fi gure 20. Effici ency vs. output current Fi gure 23. Effici ency vs. output voltage Figure 18 ...
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... OR U15, GUP15, 60 TURNS 1mm, AIR GAP 0.8mm (20 AWG) - COGEMA 969051. Figure 26. P.C. board and component layout of the circuit of Fig scale MAGNETICS 58120 - A2MPP - 45 TURNS - WIRE GAUGE 0.8mm (20AWG) Resistor values for standard output 7 voltages 12V 4.7K 6.2K 15V 4.7K 9.1K 12K 18V 4.7K 24V 4.7K 18K L4962 9/16 ...
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... L4962 APPLICATION INFORMATION (continued) Figure 27 minimal 5.1V fixed regulator; Very few component are required * COGEMA 946043 (TOROID CORE) 969051 (U15 CORE) ** EKR (ROE) Figure 28. Programmable power supply V = 5.1V to 15V 1.5A max o Load regulation (0.5A to 1.5A) = 10mV (V Line regulation (220V 15% and to I 10/ ...
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... Figure 29. DC-DC converter 5.1V/4A, 12V/1A. A suggestion how to synchronize a negative output L1 COGEMA 946043 (969051 COGEMA 946044 (946045) Figure 30. In multiple supplies several L4962s can be synchronized as shown Figure 31. Preregulator for distributed supplies * L2 and C2 are necessary to reduce the switching frequency spikes when linear regulators are remote from L4962 L4962 11/16 ...
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... L4962 MOUNTING INSTRUCTION The Rth-j-amb of the L4962 can be reduced by soldering the GND pins to a suitable copper area of the printed circuit board (Fig. 32). The diagram of figure 33 shows the R function of the side "l" of two equal square copper areas having the thickness of 35 (1.4 mils). During Figure 32 ...
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... TYP. MAX. MIN. a1 0.51 0.020 B 0.85 1.40 0.033 b 0.50 b1 0.38 0.50 0.015 D 20.0 E 8.80 e 2.54 e3 17.78 F 7.10 I 5.10 L 3.30 Z 1.27 inch MECHANICAL DATA TYP. MAX. 0.055 0.020 0.020 0.787 0.346 0.100 0.700 0.280 0.201 0.130 0.050 L4962 OUTLINE AND Powerdip 16 13/16 ...
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... L4962 mm DIM. MIN. TYP. MAX. A 4.8 C 1.37 D 2.4 2.8 0.094 D1 1.2 1.35 0.047 E 0.35 0.55 0.014 E1 0.7 0.97 0.028 F 0.6 0.8 0.024 F1 0.9 G 2.34 2.54 2.74 0.095 G1 4.88 5.08 5.28 0.193 G2 7.42 7.62 7.82 0.295 H2 10.4 H3 10.05 10.4 0.396 L 16.7 16.9 17 ...
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... L9 4.44 Dia 3.65 3.85 0.144 inch TYP. MAX. MECHANICAL DATA 0.189 0.054 0.110 0.053 0.022 0.031 0.035 0.100 0.105 0.200 0.205 0.300 0.307 0.409 0.409 0.559 0.173 0.622 0.201 0.118 0.622 0.260 0.175 0.152 L4962 OUTLINE AND Heptawatt H 15/16 ...
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... L4962 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice ...