L584 STMicroelectronics, L584 Datasheet
L584
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L584 Summary of contents
Page 1
... A key feature of the L584 is flexi- bility. It can be used with a variety of darlingtons to match the requirements of the load and it allows both simple and two level current control ...
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... L584 PIN CONNECTION ABSOLUTE MAXIMUM RATINGS Symbol V DC Supply Voltage (pin 1 open) S Positive Transient Voltage (pin 1 connected (5ms t 10ms, R rise source V Input Voltage (pins 10, 11 External Reference Voltage (pin Sense Voltage (pin 3) sens V Max D.C. and Transient Voltage 8 I Reference Current (pin 9) ...
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... Internal Clamp Zener for Fast Turn-off. 000 Functions 32V (typ.). If this protection is not used the pin must S applied to this pin sets the holding current level. set = 0.45/R (typ.); (see block diagram and fig. 4 set s in fig L584 60V. (fig. 4). If off = 35 Ir (typ 100 I (typ 3/13 ...
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... L584 ELECTRICAL CHARACTERISTICS (V otherwise specified; refer to fig. 1) Symbol Parameter V Operating Supply Voltage S V Dump Protection Threshold d R Dump Protection Input Resistance Pin 1 to GND d I Quiescent Current q V Input Threshold Voltages i I Input Current i V Reference Voltage r R Reference Resistor Range ...
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... Both the peak and holding current are regulated by the L584’s switchmode circuitry. Figure 1 : Components Connected to Pins 6 and 7 Determine the Load Current Waveshape. COMPONENTS ON PINS 6 AND 7 The duration of the high level current and the values of the peak and the holding currents can be adjusted by external components ...
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... L584 ferred, in the following formula the external darlington Q2 LOAD dn because the sensing detection is on the darlington emitter (not directly on the load). The peak current level set by the sensing re- p sistor and is found from : 0. (typ The peak value of holding current level voltage (V ...
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... Figure 4 : Waveforms of the Typical Application Circuit of Fig. 2. ground. This capacitor related to the duration 6th The discharge time constant (t capacitor C between pin 7 and ground and is found 2 from : = 100 I typ 7th in fig off L584 – 6sat (typ ref in fig 4) is set by a off – 7sat r (typ ref 7/13 ...
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... L584 Figure 5 : When pin 6 is grounded, as shown here, the injector current is regulated at a single level BDX54 8 BDW94 10 BDV64 Figure this application circuit, pin 6 is left open to give a single peak followed by a regulated holding current BDX54 8 BDW94 10 BDV64 8/13 Q2 BDX53 BDW93 BDV65 ...
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... Figure 7 : Switchmode control of the current can be suppressed entirely by leaving pin 6 open and grounding pin 7. the peak current is still controlled BDX54 8 BDW94 10 BDV64 Figure 8 : Applications circuit using only one darlington with a single level of the injector current. Q2 BDX53 BDW93 BDV65 L584 9/13 ...
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... L584 To have a very short off time when the L584 input goes LOW, an internal zener is available on pin 16. This zener is used with an external divider, R8, R9, as shown in figure 2. Suitable values can be found from : V 15V + V + VRsense pin 16 BEQ2 CQ2 pin the voltage at the collector of Q2. V ...
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... Figure 9 : Application circuit showing how two separate supplies can be used. In this application it is assumed that the 5V supply for L584 is taken from a logic supply, which is al- ready protected, against load dump transients and vol-tage reversal. Pin 1 must be left open, as shown in fig always lower than 46V even during the voltage tran- R sients ...
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... L584 DIP16 PACKAGE MECHANICAL DATA DIM. MIN. a1 0. 12/13 mm TYP. MAX. MIN. 0.020 1.65 0.030 0.5 0.25 20 8.5 2.54 17.78 7.1 5.1 3.3 1.27 inch TYP. MAX. 0.065 0.020 0.010 0.787 0.335 0.100 0.700 0.280 0.201 0.130 0.050 ...
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... SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. L584 13/13 ...