MAX16826ATJ+C24 Maxim Integrated Products, MAX16826ATJ+C24 Datasheet
MAX16826ATJ+C24
Specifications of MAX16826ATJ+C24
Related parts for MAX16826ATJ+C24
MAX16826ATJ+C24 Summary of contents
Page 1
... Adaptive Front Lighting Low- and High-Beam Assemblies Typical Application Circuit and Pin Configuration 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. o External MOSFETs Allow Wide-Range LED ...
Page 2
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection ABSOLUTE MAXIMUM RATINGS IN to GND (Continuous) .........................................-0.3V to +30V IN Peak Current (≤ 400ms) ...............................................300mA IN Continuous Current ........................................................50mA PGND to GND .......................................................-0.3V to +0.3V All Other Pins ...
Page 3
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection ELECTRICAL CHARACTERISTICS (continued 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ are +25°C.) (Note 1) A PARAMETER Maximum Receive SCL/SDA ...
Page 4
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection ELECTRICAL CHARACTERISTICS (continued 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ are +25°C.) (Note 1) A PARAMETER ERROR AMPLIFIER (FB, ...
Page 5
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection ELECTRICAL CHARACTERISTICS (continued 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ are +25°C.) (Note 1) A PARAMETER ADC (DR1–DR4, OVP) ...
Page 6
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection (V = 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ SUPPLY CURRENT vs. SUPPLY VOLTAGE ...
Page 7
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection (V = 12V, R19 = 2kΩ, C33 = 2200pF, R17 = 1.27kΩ ENABLE AND DISABLE RESPONSE MAX16826 toc09 V SYNC/EN I LED 40ms/div V VOLTAGE CC vs. ...
Page 8
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection PIN NAME 1 PGND Power Ground 2, 3 GND Analog Ground Timing Resistor and Capacitor Connection. A resistor, R19 (in the Typical Application Circuit), from V 4 RTCT RTCT ...
Page 9
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection PIN NAME near ent S our ce O utp ut ves the g ...
Page 10
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection IN 29 26V SHUNT V CC GND OVP PGND CURRENT- MODE RSC 10 PWM BLOCK CSS 6 ...
Page 11
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection The MAX16826 provides additional flexibility with an 2 internal I C serial interface to communicate with a microcontroller (µC). The interface can be used to dynamically adjust the amplitude ...
Page 12
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection The MAX16826 has an internal 26V (typ) shunt regula- tor to provide the primary protection against an auto- motive load dump. When the input voltage is below 26V, the ...
Page 13
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection 6µA CSS BUS SWR DAC 1.25V SET - OVP R Q OVP COMPARATOR CLR SHDN STBY SYNC OSCILLATOR RTCT CS ...
Page 14
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection The MAX16826 oscillator frequency is programmable using an external capacitor (C33 in the Typical Application Circuit ) and a resistor (R19) at RTCT. R19 is connected from RTCT to ...
Page 15
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection rising edge of the clock. When using external synchro- nization, the clock frequency set by RTCT must be 10% lower than the synchronization signal frequency. Overvoltage Protection (OVP) OVP ...
Page 16
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection is 2µs, so the ADC requires at least 5 of these minimum pulses within the 190ms measurement window to com- plete a conversion. During PWM dimming, LED current pulse ...
Page 17
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection Overview of the Digital Section Figure 3 shows the block diagram of the digital section in 2 the MAX16826. The I C serial interface provides flexible control of the ...
Page 18
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection open-drain bus. Both SDA and SCL are bidi- rectional lines, connected to a positive supply voltage using a pullup resistor. They both have Schmitt ...
Page 19
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection Accessing the MAX16826 The communication between the µC and the MAX16826 is based on the usage of a set of protocols defined on 2 top of the standard I ...
Page 20
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection The register file unit is used to store all the control infor- mation from the SDA line and configure the MAX16826 for different operating conditions. The register file assignments ...
Page 21
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection register. First, activate standby mode and then deacti- 2 vate this mode using the I C interface. Next, perform a read operation on the fault status register. The old ...
Page 22
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection The SEPIC power topology is very useful when the input voltage is expected to be higher or lower than the output voltage of the switching regulator stage as required ...
Page 23
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection PCB Layout and Routing Careful PCB layout is important for proper operation. Use the following guidelines for good PCB layout: • Minimize the area of the high current-switching loop ...
Page 24
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection 24 ______________________________________________________________________________________ Typical Application Circuit INTERFACE SYSTEM ...
Page 25
Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection Pin Configuration TOP VIEW DR3 25 CS4 26 DL4 27 28 DR4 MAX16826 ...
Page 26
... 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. 26 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...