L6221

Manufacturer Part NumberL6221
DescriptionQUAD DARLINGTON SWITCH
ManufacturerSTMicroelectronics
L6221 datasheet
 


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®
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FOUR NON INVERTING INPUTS WITH
.
ENABLE
.
OUTPUT VOLTAGE UP TO 50 V
.
OUTPUT CURRENT UP TO 1.8 A
.
VERY LOW SATURATION VOLTAGE
.
TTL COMPATIBLE INPUTS
INTEGRAL FAST RECIRCULATION DIODES
DESCRIPTION
The L6221 monolithic quad darlington switch is de-
signed for high current, high voltage switching appli-
cations. Each of the four switches is controlled by a
logic input and all four are controlled by a common
enable input. All inputs are TTL-compatible for direct
connection to logic circuits.
Each switch consists of an open-collector darlington
transistor plus a fast diode for switching applications
with inductive device loads. The emitters of the four
switches are commoned. Any number of inputs and
outputs of the same device may be paralleled.
BLOCK DIAGRAM
June 2003
L6221AS L6221AD
QUAD DARLINGTON SWITCH
Powerdip 12 + 2 + 2
SO16+2+2
ORDERING NUMBERS:
L6221AS (Powerdip)
L6221N (Multiwatt15)
L6221AD (SO16+2+2)
L6221N
Multiwatt 15
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L6221 Summary of contents

  • Page 1

    ... TTL COMPATIBLE INPUTS INTEGRAL FAST RECIRCULATION DIODES DESCRIPTION The L6221 monolithic quad darlington switch is de- signed for high current, high voltage switching appli- cations. Each of the four switches is controlled by a logic input and all four are controlled by a common enable input. All inputs are TTL-compatible for direct connection to logic circuits ...

  • Page 2

    ... L6221AS - L6221AD - L6221N THERMAL DATA Symbol R Thermal Resistance Junction-pins th j-pins R Thermal Resistance Junction-case th j-case R Thermal Resistance Junction-ambient th j-amb PIN CONNECTIONS (top views) L6221AS (Powerdip) 2/15 Parameter Max. Max. Max. OUT4 CLAMPB N.C. OUT3 GND GND OUT2 N.C. CLAMPA OUT1 L6221N (Multiwatt-15) SO20 Powerdip Multiwatt15 ...

  • Page 3

    ... C (multiwatt) case (SO20) case (powerdip) amb (multiwatt) amb (SO20) amb Input Function L6221AS - L6221AD - L6221N Value Unit 1.8 2.5 3.2 – 150 – 150 350 4.3 20 3.5 1 2.3 1 Power Out ON OFF OFF V ...

  • Page 4

    ... L6221AS - L6221AD - L6221N ELECTRICAL CHARACTERISTICS Refer to the test circuit to Fig Fig Symbol Parameter V Logic Supply Voltage S I Logic Supply Current s V Output Sustaining Voltage CE(sus) I Output Leakage Current CEX V Collector Emitter Saturation Voltage CE(sat) (one input on ; all others inputs off.) ...

  • Page 5

    ... TEST CIRCUITS (X) = Referred to Multiwatt package X = Referred to Powerdip package Figure 1 : Logic supply current 4.5V 0.8V 0.8V 2V 2V, for I (all outputs on Figure 2 : Output Sustaining Voltage. = 4.5V, for I (all outputs off Figure 3 : Output Leakage Current. L6221AS - L6221AD - L6221N 5/15 ...

  • Page 6

    ... L6221AS - L6221AD - L6221N Figure 4 : Collector-emitter Saturation Voltage Figure 6 : Clamp Diode Leakage Current. 6/15 Figure 5 : Logic Input Characteristics open 0.8V for open for close 0.8V for ...

  • Page 7

    ... Figure 8 : Switching Times Test Circuit. Figure 10 : Allowed Peak Collector Current ver- sus Duty Cycle for Con- temporary Working Outputs (L6221AS) L6221AS - L6221AD - L6221N Figure 9 : Switching TImes Waveforms. Figure 11 : Allowed Peak Collector Current ver- sus Duty Cycle for Con- temporary Working Outputs ...

  • Page 8

    ... L6221AS - L6221AD - L6221N Figure 12 : Collector Saturation Voltage versus Collector Current Figure 14 : Collector Saturation Voltage versus Junction Temperature Figure 16 : Saturation Voltage vs. Junc- 8/15 Figure 13 : Free-wheeling Diode Forward Voltage versus Diode Current Figure 15 : Free-wheeling Diode Forward Voltage versus Junction Temperature Figure 17 : Free-wheeling Diode Forward ...

  • Page 9

    ... APPLICATION INFORMATION When inductive loads are driven by L6221A/N, a zener diode in series with the integral free-wheeling diodes increases the voltage across which energy stored in the load is discharged and therefore speeds the current decay (fig. 18). For reliability it is suggested that the zener is chosen ...

  • Page 10

    ... L6221AS - L6221AD - L6221N Figure 20 : Saturation Voltage versus Collector Current Figure 22 : Peak Collector Current versus Duty Cycle for Paralleled Outputs Driven (L6221N) 10/15 Figure 21 : Peak Collector Current versus Duty Cycle for Paralleled Outputs Driven (L6221AS) ...

  • Page 11

    ... MOUNTING INSTRUCTION The R of the L6221AS can be reduced by sol- th j-amb dering the GND pins to a suitable copper area of the printed circuit board (Fig. 23 external heatsink (Fig. 24). The diagram of figure 25 shows the maximum dis- sipable power P and the R tot th j-amb the side " ...

  • Page 12

    ... L6221AS - L6221AD - L6221N mm DIM. MIN. TYP. MAX. 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 12/15 inch MIN. TYP. MAX. 0.055 0.020 0.020 0.787 0.346 0.100 0.700 0.280 0.201 0.130 0.050 OUTLINE AND MECHANICAL DATA Powerdip 16 ...

  • Page 13

    ... Dia1 3.65 3.85 0.144 inch TYP. MAX. MECHANICAL DATA 0.197 0.104 0.063 0.039 0.022 0.030 0.050 0.060 0.700 0.710 0.795 0.874 0.886 0.870 0.886 0.713 0.689 0.699 0.421 0.429 0.114 0.179 0.191 0.200 0.218 0.102 0.102 0.152 L6221AS - L6221AD - L6221N OUTLINE AND Multiwatt15 V 13/15 ...

  • Page 14

    ... L6221AS - L6221AD - L6221N mm DIM. MIN. TYP. MAX. A 2.35 2.65 0.093 A1 0.1 0.3 0.004 B 0.33 0.51 0.013 C 0.23 0.32 0.009 D 12.6 13 0.496 E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 0.010 L 0.4 1.27 0.016 K 0˚ (min.)8˚ (max 14/15 inch MIN. TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.050 0.419 0.030 0.050 ...

  • Page 15

    ... STMicroelectronics – Printed in Italy – All Rights Reserved Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. STMicroelectronics GROUP OF COMPANIES http://www.st.com L6221AS - L6221AD - L6221N 15/15 ...