MAX16821BEVKIT+ Maxim Integrated Products, MAX16821BEVKIT+ Datasheet
MAX16821BEVKIT+
Specifications of MAX16821BEVKIT+
Related parts for MAX16821BEVKIT+
MAX16821BEVKIT+ Summary of contents
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... LCD TVs and Display Backlight Automotive Emergency Lighting and Signage Typical Operating Circuit and Selector Guide appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. High-Power Synchronous HBLED ♦ ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing ABSOLUTE MAXIMUM RATINGS IN to SGND.............................................................-0.3V to +30V BST to SGND..........................................................-0.3V to +35V BST to LX..................................................................-0. ...........................................-0. PGND................................................-0. SGND............................................................-0.3V ...
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Drivers with Rapid Current Pulsing ELECTRICAL CHARACTERISTICS (continued 5V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL OSCILLATOR Switching Frequency ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing ELECTRICAL CHARACTERISTICS (continued 5V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL ...
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Drivers with Rapid Current Pulsing ELECTRICAL CHARACTERISTICS (continued 5V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL ENABLE INPUT (EN) ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing (V = 12V 5V +25°C, unless otherwise noted LOW-SIDE DRIVER (DL) SINK AND SOURCE CURRENT MAX16821A toc07 C = 22nF LOAD V ...
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Drivers with Rapid Current Pulsing PIN NAME 1 PGND Power-Supply Ground 2, 7 N.C. No Connection. Not internally connected Low-Side Gate-Driver Output Boost-Flying Capacitor Connection. Reservoir capacitor connection for the high-side MOSFET driver 4 BST supply. Connect a ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing Detailed Description The MAX16821A/MAX16821B/MAX16821C are high-per- formance average current-mode PWM controllers for high-power and high-brightness LEDs (HBLEDs). The average current-mode control technique offers inherently stable operation, reduces component derating and size by ...
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Drivers with Rapid Current Pulsing 0 +5V LDO V CC I.C. CLP CSP A = 34.5 V CSN LOW CLAMP OUTV CLK RT/SYNC OSCILLATOR RAMP CLKOUT GENERATOR ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing The MAX16821A/MAX16821B/MAX16821C synchronize to an external clock connected to RT/SYNC. The appli- cation of an external clock at RT/SYNC disables the internal oscillator. Once the MAX16821A/MAX16821B/ MAX16821C are synchronized to an external ...
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Drivers with Rapid Current Pulsing Current-Error Amplifier The MAX16821A/MAX16821B/MAX16821C include a transconductance current-error amplifier with a typical g of 550µS and 320µA output sink and source capa- m bility. The current-error amplifier output (CLP) is con- nected to the inverting ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing Voltage-Error Amplifier (VEA) The VEA sets the gain of the voltage control loop, and determines the error between the differential amplifier output and the internal reference voltage. The VEA out- put clamps ...
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Drivers with Rapid Current Pulsing Applications Information Boost LED Driver Figure 5 shows the MAX16821A/MAX16821B/MAX16821C configured as a synchronous boost converter with MODE connected During the on-time, the input CC voltage charges the inductor. During the off-time, ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing Input-Referenced Buck-Boost LED Driver The circuit in Figure 6 shows a step-up/step-down reg- ulator similar to the boost converter in Figure 5 in that the inductor is connected to the ...
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Drivers with Rapid Current Pulsing SEPIC LED Driver Figure 7 shows the MAX16821A/MAX16821B/ MAX16821C configured as a SEPIC LED driver. While buck topologies produce an output always lower than the input, and boost topologies produce an output always greater than ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing Low-Side Buck Driver with Synchronous Rectification In Figure 8, the input voltage goes from 7V to 28V and, because of the ground-based current-sense resistor, the output voltage can be as high as ...
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Drivers with Rapid Current Pulsing High-Side Buck Driver with Synchronous Rectification In Figure 9, the input voltage goes from 7V to 28V, the LED load is connected from the positive side to the current- sense resistor (R1) in series with ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing Inductor Selection The switching frequency, peak inductor current, and allowable ripple at the output determine the value and size of the inductor. Selecting higher switching frequen- cies reduces inductance requirements, but at ...
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Drivers with Rapid Current Pulsing Use low-ESR ceramic capacitors with high ripple-cur- rent capability at the input. In the case of the boost topology where the inductor is in series with the input, the ripple current in the capacitor is ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing Boost: × RAMP SW ≤ × × LED S The crossover frequency of the inner current loop is given by ...
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Drivers with Rapid Current Pulsing V LED R10 Q5 R9 PWM DIM Q4 C11 C10 PWM DIM Figure 11. Boost LED Driver with PWM Dimming Power Dissipation Calculate power dissipation in ...
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High-Power Synchronous HBLED Drivers with Rapid Current Pulsing Use the following guidelines to layout the LED driver. 1) Place the IN and close to the MAX16821A/MAX16821B/MAX16821C. 2) Minimize the area and length of the high-current ...
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Drivers with Rapid Current Pulsing V LED R9 R10 14 I.C. C11 15 OVI C10 R9 16 CLP R7 17 EAOUT C9 C8 EAN DIFF 20 CSN CSP 21 SGND SENSE- SENSE+ 22 For the latest package ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products ...