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ZLED7015KIT-E1: Description1.0MHz Boost Converter with Internal 35V Switch; File Size716KB，23 Pages; ManufacturerETC2

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1.0MHz Boost Converter with Internal 35V Switch

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Data Sheet

Rev. 1.00 / December 2011

ZLED7015

1.0MHz Boost Converter with Internal 35V Switch

ZLED7015

1.0MHz Boost Converter with Internal 35V Switch

Contents

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

1.1

1.2

1.3

1.4

1.5

2.1

2.2

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

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

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

Typical Operating Characteristics .......................................................................................................................... 8

Characteristic Waveforms .................................................................................................................................... 10

EN Pin, VP Pin, and Soft-Start Function .............................................................................................................. 12

Output Current Control......................................................................................................................................... 12

Output Current and R

.................................................................................................................................. 12

Dimming via External DC Voltage Control .................................................................................................... 13

Dimming via PWM Control............................................................................................................................ 14

Microcontroller LED Control .......................................................................................................................... 15

Constant Voltage Application ........................................................................................................................ 15

Circuit Description ....................................................................................................................................................... 12

2.2.1

2.2.2

2.2.3

2.2.4

2.2.5

3.1

3.2

3.3

3.4

3.5

3.6

4.1

4.2

4.3

Application Circuit Design ........................................................................................................................................... 17

External Component – R

.................................................................................................................................... 17

External Component – Inductor L

....................................................................................................................... 17

External Components – Input Decoupling Capacitors C

and C

........................................................................ 17

External Component –Output Capacitors C

and C

OUT

........................................................................................ 17

External Component – Diode D

.......................................................................................................................... 17

Additional External Components .......................................................................................................................... 17

Under-Voltage Lockout ........................................................................................................................................ 18

Over-Voltage Threshold and Open-Circuit Protection .......................................................................................... 18

Over-Temperature Protection .............................................................................................................................. 18

Operating Conditions................................................................................................................................................... 18

ESD/Latch-Up-Protection ............................................................................................................................................ 19

Pin Configuration and Package ................................................................................................................................... 19

Layout Requirements .................................................................................................................................................. 21

7.1

7.2

7.3

7.4

7.5

7.6

7.7

General Considerations and Ground Traces ....................................................................................................... 21

Layout Considerations for C

, C

and C

OUT

................................................................................................... 21

Layout Considerations for the EN Pin .................................................................................................................. 21

Layout Considerations for the LX Pin, L

External Coil, and D

Diode ................................................................. 21

Layout Considerations for the External Current Sense Resistor (R

) .................................................................. 21

Layout Considerations for C

and C

VDD

.............................................................................................................. 21

Layout Considerations for the Thermal Pad......................................................................................................... 21

Glossary of Terms ....................................................................................................................................................... 22

Ordering Information ................................................................................................................................................... 22

Document Revision History ......................................................................................................................................... 22

Data Sheet

December 20, 2011

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

4 of 22

ZLED7015

1.0MHz Boost Converter with Internal 35V Switch

List of Figures

Figure 1.1

Figure 1.2

Figure 1.3

Figure 1.4

Figure 1.5

Figure 1.6

Figure 1.7

Figure 1.8

Figure 1.9

Figure 1.10

Figure 1.11

Figure 1.12

Figure 1.13

Figure 2.1

Figure 2.2

Figure 2.3

Figure 2.4

Figure 6.1

Figure 6.2

OUT

vs. V

with R

= 0.42Ω ............................................................................................................................ 8

OUT

vs. V

with R

= 0.88Ω ............................................................................................................................ 8

OUT

vs. V

OUT

with R

= 0.42Ω ......................................................................................................................... 8

OUT

vs. V

OUT

with R

= 0.88Ω ......................................................................................................................... 8

Efficiency vs. V

with R

= 0.42Ω .................................................................................................................. 8

Efficiency vs. V

with R

= 0.88Ω .................................................................................................................. 8

Efficiency vs. V

OUT

with R

= 0.42Ω ................................................................................................................ 9

Efficiency vs. V

OUT

with R

= 0.88Ω ................................................................................................................ 9

Reverence Voltage vs. V

....................................................................................................................... 9

OUT

vs. PWM Duty Cycle ................................................................................................................................ 9

OUT

, V

, and I

during Soft Start ................................................................................................................ 10

OUT

, V

, and I

OUT

during Typical Operation ................................................................................................ 10

OUT

, V

, and I

when Over-Voltage Protection (OVP) Threshold is Exceeded ......................................... 11

Typical Application Circuit ............................................................................................................................ 13

Example Circuit for Controlling Output Current via an External DC Control Voltage .................................... 13

Example Circuit for Controlling Output Current via a PWM Control Signal ................................................... 14

Example Circuit for Constant Voltage Source Applications .......................................................................... 16

ZLED7015 Pin Configuration—MSOP-10 Package...................................................................................... 19

MSOP-10 Package Dimensions for the ZLED7015 ...................................................................................... 20

List of Tables

Table 1.1

Table 1.2

Table 1.3

Table 6.1

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

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

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

Pin Description MSOP-10............................................................................................................................. 19

Data Sheet

December 20, 2011

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

5 of 22

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