 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MAX16821 Datasheet(PDF) 1 Page - Maxim Integrated Products |
|
|
|||||||||||||||||||||||||||||
MAX16821 Datasheet(HTML) 1 Page - Maxim Integrated Products |
|
|
1 / 24 page  General Description The MAX16821A, MAX16821B, and MAX16821C pulse- width-modulation (PWM) LED driver controllers provide high output-current capability in a compact package with a minimum number of external components. The MAX16821A–MAX16821C are suitable for use in synchro- nous and nonsynchronous step-down (buck), boost, buck- boost, SEPIC, and Cuk LED drivers. A logic input (MODE) allows the devices to switch between synchronous buck and boost modes of operation. These devices are the first high-power drivers designed specifically to accommodate common-anode HB LEDs. The ICs offer average current-mode control that enable the use of MOSFETs with optimal charge and on- resistance figure of merit, thus minimizing the need for external heatsinking even when delivering up to 30A of LED current. The differential sensing scheme provides accurate control of the LED current. The ICs operate from a 4.75V to 5.5V supply range with the internal regulator disabled (VCC connected to IN). These devices operate from a 7V to 28V input supply voltage with the internal regulator enabled. The MAX16821A–MAX16821C feature a clock output with 180° phase delay to control a second out-of-phase LED driver to reduce input and output filter capacitor size and to minimize ripple currents. The wide switching fre- quency range (125kHz to 1.5MHz) allows the use of small inductors and capacitors. Additional features include programmable overvoltage protection and an output enable function. Applications ● Front Projectors/Rear-Projection TVs ● Portable and Pocket Projectors ● LCD TVs and Display Backlight Features ● Up to 30A Output Current ● True-Differential Remote Output Sensing ● Average Current-Mode Control ● 4.75V to 5.5V or 7V to 28V Input Voltage Range ● 0.1V/0.03V LED Current-Sense Options Maximize Efficiency (MAX16821B/MAX16821C) ● Thermal Shutdown ● Nonlatching Output-Overvoltage Protection ● Low-Side Buck Mode with or without Synchronous Rectification ● High-Side Buck and Low-Side Boost Mode with or without Synchronous Rectification ● 125kHz to 1.5MHz Programmable/Synchronizable Switching Frequency ● Integrated 4A Gate Drivers ● Clock Output for 180° Out-of-Phase Operation for Second Driver ● -40°C to +125°C Operating Temperature Range Typical Operating Circuit and Selector Guide appears at end of data sheet. +Denotes lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. PART TEMP RANGE PIN-PACKAGE MAX16821AATI+ -40°C to +125°C 28 TQFN-EP* MAX16821BATI+ -40°C to +125°C 28 TQFN-EP* MAX16821CATI+ -40°C to +125°C 28 TQFN-EP* Q1 HIGH-FREQUENCY PULSE TRAIN C2 Q3 L1 R1 VLED C1 7V TO 28V CSP DL DH PGND EN IN I.C. OVI CLP Q2 MAX16821 MAX16821A/MAX16821B/ MAX16821C High-Power Synchronous HBLED Drivers with Rapid Current Pulsing 19-0881; Rev 4; 4/18 Click here for production status of specific part numbers. Not Recommended for New Designs. Refer to MAX20078 for New Designs. Simplified Diagram Ordering Information EVALUATION KIT AVAILABLE |
Similar Part No. - MAX16821 |
|
Similar Description - MAX16821 |
|
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
