ZLED7520 Datasheet, PDF (5/28 Pages) List of Unclassifed Manufacturers – High Current 40V LED Driver with Internal Switch

ZLED7520
High Current 40V LED Driver with Internal Switch
List of Figures
Figure 1.1
Figure 1.2
Figure 1.3
Figure 1.4
Figure 1.5
Figure 1.6
ZLED7x20 Supply Operating Current vs. Input Supply Voltage (VIN = 6 to 40 V) ........................................... 8
ZLED7x20 Supply Quiescent Shutdown Current vs. Input Supply Voltage (VIN = 6 to 40 V).......................... 8
Efficiency (%) vs. Input Supply Voltage (VIN = 6 to 40 V) Per Number of LEDs (Rs=0.10Ω, L1=47µH).......... 9
Efficiency vs. Input Supply Voltage (VIN = 6 to 40 V) Per Number of LEDs (Rs=0.15Ω, L1=47µH) ................ 9
Efficiency vs. Input Supply Voltage (VIN = 6 to 40 V)^‡ Per Number of LEDs (Rs=0.30Ω, L1=47µH)............. 10
Output Current Variation vs. Input Supply Voltage (VIN = 6 to 40 V) Per Number of LEDs
(Rs=0.15Ω, L1=47µH) .................................................................................................................................. 10
Figure 1.7
Figure 1.8
Sense Voltage vs. Operating Temperature (Rs=0.10Ω, L1=47µH, VIN = 40 V) ............................................ 11
Dimming Rate with 100Hz Square Wave Control Signal (PWM) at ADJ Pin (current rise time=7.85µs) ..... 11
Figure 1.9
Figure 3.1
LED Open-Circuit Protection (Rs=0.30Ω, L1=47µH, VIN = 24 V) .................................................................. 12
Basic ZLED7x20 Application Circuit with Output Current Determined only by Rs ........................................ 15
Figure 3.2 Basic ZLED7x20 Application Circuit with Output Current Controlled by External DC Voltage ...................... 16
Figure 3.3 Basic ZLED7x20 Application Circuit with Output Current Set by External Square Wave Voltage (PWM) .... 16
Figure 3.4 Basic ZLED7x20 Application Circuit with Output Current Controlled by External Microcontroller Signal...... 17
Figure 5.1 ZLED7020 Pin Configuration – SOT89-5 Package....................................................................................... 23
Figure 5.2 SOT89-5 Package Dimensions for the ZLED7020 ....................................................................................... 24
Figure 5.3 ZLED7320, ZLED7520 & ZLED7720 Pin Configuration — DFN-5 Package ................................................ 25
Figure 5.4 DFN-5 (DFN4*4-05L) Package Dimensions for the ZLED7320, ZLED7520 & ZLED7720 ........................... 26
List of Tables
Table 3.1
Table 5.1
Recommended Values for Sense Resistor Rs (ADJ pin floating at nominal voltage VREF=1.2V).................. 18
ZLED7020 Pin Descriptions—SOT89-5 Package......................................................................................... 23
Table 5.2 ZLED7320, ZLED7520 & ZLED7720 Pin Descriptions — DFN-5 Package .................................................. 25
Data Sheet
August 12, 2011
© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 1.2
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
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