MC33341 Motorola, MC33341 Datasheet
MC33341
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MC33341 Summary of contents
Page 1
... Power Supply Battery Charger Regulation Control Circuit The MC33341 is a monolithic regulation control circuit that is specifically designed to close the voltage and current feedback loops in power supply and battery charger applications. This device features the unique ability to perform source high–side, load high–side, source low–side and load low– ...
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... High–Side Source and Load Current Sensing (Pin 6 > 2.0 V) Voltage Threshold Adjust (Pin 6 < 1.2 V) Current Sense Threshold Adjust (Pin 2) Input Bias Current Transconductance, Current Sensing Inputs to Drive Output NOTE: 1. Tested ambient temperature range for the MC33341: T low = – high = + MC33341 Symbol Value ...
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... High State Source Voltage (I Source = 10 mA) High State Source Current (Pin TOTAL DEVICE (Pin 7) Operating Voltage Range Power Supply Current ( 6.0 V) NOTE: 1. Tested ambient temperature range for the MC33341: T low = – high = +85 C. Pin Name 1 Current Sense Input A This multi–mode current sensing input can be used for either source high–side, load high–side, source– ...
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... V Pin 2 –V Pin 120 160 200 V Pin 2 , CURRENT THRESHOLD ADJUST (mV) 4 MC33341 Threshold Change versus Temperature 1 6 –1.0 –2.0 1 – Source High–Side and Load High–Side 2 – Source Return Low–Side 3 – Load Low–Side –3.0 ...
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... Figure 11. Drive Output High State Source Saturation versus Load Current –0.4 –0.8 –1.2 –1.6 –2.0 0 4.0 8 OUTPUT LOAD CURRENT (mA) MOTOROLA ANALOG IC DEVICE DATA MC33341 Current Sensing Inputs to Drive Output 60 80 Phase 50 Low–Side Sensing 100 40 120 30 140 6 1.0 V 160 ...
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... Typical feedback loop circuits may consist of a voltage and current amplifier, level shifting circuitry, summing circuitry and a reference. The MC33341 contains all of these basic functions in a manner that is easily adaptable to many of the various power source–load configurations. ...
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... Source Return The above figure shows the MC33341 configured for source high–side current sensing allowing a common ground path between Load – and Source Return –. The Differential Amplifier inputs, Pins 1 and 6, are used to sense the load induced voltage drop that appears across resistor The internal voltage and current regulation thresholds are selected by the respective external connections of Pins 2 and 6 ...
Page 8
... Control Source Return The above figure shows the MC33341 configured for source high–side current sensing with an externally adjustable current threshold. Operation of this circuit is similar to that of Figure 13. The current regulation threshold can be adjusted over a range 200 mV with respect to Pin 4. ...
Page 9
... Source Return The above figure shows the MC33341 configured for source return low–side current sensing allowing a common power path between Source + and Load +. This configuration is especially suited for negative output applications where a common ground path, Source + to Load +, is desired. The Inverting Amplifier inputs, Pins 1 and 4, are used to sense the load induced voltage drop that appears across resistor R S ...
Page 10
... Source Return The above figure shows the MC33341 configured for source return low–side current sensing with externally adjustable voltage and current thresholds. Operation of this circuit is similar to that of Figure 15. The respective voltage and current regulation threshold can be adjusted over a range 1.6 V and 200 mV with respect to Pin 4. ...
Page 11
... Source Return The above figure shows the MC33341 configured for load high–side current sensing allowing common paths for both power and ground, between the source and load. The Differential Amplifier inputs, Pins 1 and 6, are used to sense the load induced voltage drop that appears across resistor The internal voltage and current regulation thresholds are selected by the respective external connections of Pins 2 and 6 ...
Page 12
... Control Source Return The above figure shows the MC33341 configured for load high–side current sensing with an externally adjustable current threshold. Operation of this circuit is similar to that of Figure 17. The current regulation threshold can be adjusted over a range 200 mV with respect to Pin 4. ...
Page 13
... Source Return The above figure shows the MC33341 configured for load low–side current sensing allowing common paths for both power and ground, between the source and load. The Noninverting input paths, Pins 1 and 4, are used to sense the load induced voltage drop that appears across resistor R S ...
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... Source Return The above figure shows the MC33341 configured for load low–side current sensing with an externally adjustable voltage and current threshold. Operation of this circuit is similar to that of Figure 19. The respective voltage and current regulation threshold can be adjusted over a range 1.2 V and 200 mV, with respect to Pin 4. ...
Page 15
... NOTE: An excessive load induced voltage across R S can occur if either the source input or load output is shorted. This voltage can easily be bounded with the addition of the diodes shown without degrading the current sensing accuracy. This bounding technique can be used in any of the MC33341 applications where high peak currents are anticipated. Figure 22. Multiple Output Current and Voltage Regulation ...
Page 16
... Figure 23 shows the MC33341 configured as a source high–side constant–voltage constant–current regulator. The regulator is designed for an output voltage 1.0 A. Figure 24 shows the regulator’s output characteristics as the load is varied. Source return low–side, load high–side, and load low–side configurations will each exhibit a nearly identical load regulation characteristic ...
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... Input Ground Figure 25 shows that the MC33341 can be configured as a high–side constant–current constant–voltage switch mode charger. This circuit operates as a step down converter. With a nominal input voltage and output load current as stated above, the switching frequency is approximately 28 kHz with and an associated conversion efficiency of 86 percent. The switching fre- quency will vary with changes in input voltage and load current ...
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... SEATING PLANE 0.13 (0.005 0. 0. MC33341 OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 626–05 ISSUE K NOTES SUFFIX PLASTIC PACKAGE CASE 751–05 (SO–8) ISSUE ...
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... Motorola was negligent regarding the design or manufacture of the part. Motorola and Opportunity/Affirmative Action Employer. MOTOROLA ANALOG IC DEVICE DATA MC33341 are registered trademarks of Motorola, Inc. Motorola, Inc Equal 19 ...
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... JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 81–3–3521–8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 MOTOROLA ANALOG IC DEVICE DATA MC33341/D ...