ZLED7320-KIT datasheet, PDF - EEWORLD Datasheet

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ZLED7320-KIT: DescriptionLED Lighting Development Tools ZLED7320 Demo Kit; CategoryDevelopment board/suite/development tools; File Size1MB，28 Pages; ManufacturerIDT (Integrated Device Technology, Inc.); Websitehttp://www.idt.com/

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LED Lighting Development Tools ZLED7320 Demo Kit

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Product Category	LED Lighting Development Tools
Manufacturer	IDT (Integrated Device Technology, Inc.)
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Data Sheet

Rev. 1.40 / June 2014

ZLED7x20 Family

High Current 40V LED Driver with Internal Switch

Automotive ASICs and Industrial ASSPs

LED Lighting ICs

Multi-Functional and Robust

ZLED7x20 Family

High Current 40V LED Driver with Internal Switch

Contents

IC Characteristics .......................................................................................................................................................... 6

1.1

1.2

1.3

1.4

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

Absolute Maximum Ratings ................................................................................................................................... 6

Operating Conditions ............................................................................................................................................. 6

Electrical Parameters ............................................................................................................................................. 7

Typical Operation Graphs ...................................................................................................................................... 8

ZLED7x20 Overview ............................................................................................................................................ 13

Control of Output Current via External Sense Resistor Rs .................................................................................. 13

Control of Output Current via an External DC Control Voltage on the ADJ Pin ................................................... 13

Additional Requirements if the V

Input Voltage has a High Slew Rate .............................................................. 14

Control of Output Current via a PWM Signal on the ADJ Pin............................................................................... 14

Control of Output Current via a Microcontroller Signal on the ADJ Pin ................................................................ 14

Shutdown Mode ................................................................................................................................................... 14

ZLED7x20 Protection Features ............................................................................................................................ 15

Thermal Shut-down Protection ..................................................................................................................... 15

LED Open Load Protection ........................................................................................................................... 15

Circuit Description ....................................................................................................................................................... 13

2.8.1

2.8.2

3.1

3.2

Application Circuit Design ........................................................................................................................................... 16

Applications ......................................................................................................................................................... 16

Thermal Considerations for Application Design ................................................................................................... 18

Temperature Effects of Load, Layout, and Component Selection ................................................................ 18

Temperature Effects of Low Supply Voltage V

........................................................................................... 18

Sense Resistor Rs ........................................................................................................................................ 18

Inductor L1.................................................................................................................................................... 19

Bypass Capacitor C1 .................................................................................................................................... 20

De-bouncing Capacitor C2 ........................................................................................................................... 21

Capacitor C3 for Reducing Output Ripple..................................................................................................... 22

Diode D1....................................................................................................................................................... 22

3.2.1

3.2.2

3.3

3.3.1

3.3.2

3.3.3

3.3.4

3.3.5

3.3.6

3.4

External Component Selection ............................................................................................................................ 18

Application Circuit Layout Requirements ............................................................................................................. 22

ESD Protection ............................................................................................................................................................ 23

Pin Configuration and Package ................................................................................................................................... 23

5.1

5.2

SOT89-5 Package Pin-out and Dimensions for the ZLED7020 ........................................................................... 23

DFN-5 Package Pin-out and Dimensions for the ZLED7320, ZLED7520 and ZLED7720 ................................... 25

Ordering Information ................................................................................................................................................... 27

Related Documents ..................................................................................................................................................... 27

Glossary ...................................................................................................................................................................... 27

Document Revision History ......................................................................................................................................... 28

Data Sheet

June 11, 2014

the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

4 of 28

ZLED7x20 Family

High Current 40V LED Driver with Internal Switch

List of Figures

Figure 1.1 ZLED7x20 Supply Operating Current vs. Input Supply Voltage (V

= 6 to 40 V) ................................................... 8

Figure 1.2 ZLED7x20 Supply Quiescent Shutdown Current vs. Input Supply Voltage (V

= 6 to 40 V) .................................. 8

Figure 1.3 Efficiency (%) vs. Input Supply Voltage (V

= 6 to 40 V) Per Number of LEDs (Rs=0.10Ω, L1=47μH).................. 9

Figure 1.4 Efficiency vs. Input Supply Voltage (V

= 6 to 40 V) Per Number of LEDs (Rs=0.15Ω, L1=47μH) ........................ 9

Figure 1.5 Efficiency vs. Input Supply Voltage (V

= 6 to 40 V) Per Number of LEDs (Rs=0.30Ω, L1=47μH) ..................... 10

Figure 1.6 Output Current Variation vs. Input Supply Voltage (V

= 6 to 40 V) Per Number of LEDs (Rs = 0.15Ω, L1 = 47μH)

............................................................................................................................................................................. 10

Figure 1.7 Sense Voltage vs. Operating Temperature (Rs=0.10Ω, L1=47μH, V

= 40 V) .................................................... 11

Figure 1.8 Dimming Rate with 100Hz Square Wave Control Signal (PWM) at ADJ Pin (current rise time=7.85μs) ............. 11

Figure 1.9 LED Open-Circuit Protection (Rs=0.30Ω, L1=47μH, V

= 24 V) .......................................................................... 12

Figure 3.1 Basic ZLED7x20 Application Circuit with Output Current Determined only by Rs ................................................ 16

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) ............ 17

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

Table 5.2

Recommended Values for Sense Resistor Rs (ADJ pin floating at nominal voltage V

REF

=1.2V) .......................... 18

ZLED7020 Pin Descriptions—SOT89-5 Package................................................................................................. 23

ZLED7320, ZLED7520 & ZLED7720 Pin Descriptions — DFN-5 Package .......................................................... 25

Data Sheet

June 11, 2014

the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

5 of 28

ZLED7320-KIT Related Products

	ZLED7320-KIT	ZLED7520-ZI1R	ZLED7320-ZI1R
Description	LED Lighting Development Tools ZLED7320 Demo Kit	Integrated Device Technology
Product Category	LED Lighting Development Tools	Integrated Device Technology	Integrated Device Technology
Manufacturer	IDT (Integrated Device Technology, Inc.)	IDT (Integrated Device Technology, Inc.)	IDT (Integrated Device Technology, Inc.)

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