CAT4106AGEVB CAT4106 LED Driver Evaluation Board User's Manual http://onsemi.com EVAL BOARD USER’S MANUAL Introduction Operation Procedure This document describes the CAT4106AGEVB evaluation board for the CAT4106 quad-channel DC/DC boost LED driver. The major operating characteristics of the CAT4106 can be measured with this board. The CAT4106 DC/DC converter is capable of driving up to 4 strings of LEDs with tight matching. This device is designed to drive LED strings up to 36 V. The LED brightness is set by a single resistor from the RSET pin to GND and PWM dimming is available via the EN/PWM pin. Additional information can be found in the CAT4106 data sheet. The CAT4106AGEVB board contains one CAT4106 in a typical application circuit. The board can be powered in two different ways. With the J1 jumper in place a single high voltage supply (6 V to 24 V) can be applied between VL and GND. A circuit on board will generate a lower, regulated voltage for the VIN pin (6.2 V – VGS of transistor M1). VIN can also be powered separately by removing the J1 jumper and applying a second voltage to the VIN test point. The voltage at VIN should not exceed 6.0 V. VFMAX and VFMIN are set by potentiometers R4 and R6 respectively. The VFMIN potentiometer is located closest to the VIN test point. These can be used to set the maximum and minimum allowable forward voltages for any given LED string. For the CAT4106AGEVB, the settings for these potentiometers are calculated as follows: R4 + 69.8 kW R6 + 60 kW October, 2011 − Rev. 1 FMAX ǒV1.2 V * 1Ǔ * 100 kW FMIN (eq. 1) (eq. 2) Any open LED conditions will trigger a fault condition. Any short LED conditions will only trigger a fault condition during power-up. A red LED will turn on when a fault condition takes place. The LED current is set by potentiometer R13 which is labeled RSET on the CAT4106AGEVB. The anode end of each LED string should be connected to VOUT and the cathode ends can be connected at the available header connectors J5 and J6. Placing jumpers on J5 and J6 headers allows to short two or more LED channels together. EN or PWM input signals can be connected at the EN/PWM test point. The voltage at EN/PWM should not exceed 6.0 V. The CAT4106 can support PWM frequencies up to 2 kHz. Figure 1. CAT4106AGEVB Board Semiconductor Components Industries, LLC, 2011 ǒV1.2 V * 1Ǔ * 100 kW 1 Publication Order Number: EVBUM2024/D CAT4106AGEVB D L VL 47 mH R9 100 W C2 4.7 mF M1 VIN 1 J1 SW R8 60 kW GND VOUT U1 2 C3 10 mF 6 SW EN/PWM VIN 9 EN/PWM 7 C1 1 mF EN/PWM R14 100 kW Z1 6.2 V 13 R2 R1 649 W 10 28 kW 5 VIN EN/PWM VFMIN RSET LED1 CTRL LED2 FB LED3 LED4 R3 28 kW R13 20 kW CAT4106 R10 FAULT VFMAX GND FAULT PGND 2 4 VIN 1 kW R4 2.2 MW R6 2.2 MW SW SW R11 100 kW R12 100 kW R5 69.8 kW R7 60 kW 12 11 1 LED1 16 LED2 15 LED3 14 LED4 3 FAULT J5 LED1 1 1 LED2 2 2 LED3 3 3 LED4 4 4 J6 LED1 LED2 LED3 LED4 Figure 2. CAT4106AGEVB Board Schematic Table 1. BILL OF MATERIALS Name Manufacturer Description U1 ON Semiconductor 4-Channel Boost LED Driver, 4 mm x 4 mm TQFN CAT4106 Part Number Units 1 C1 AVX Ceramic Capacitor 1.0 mF/10 V, 10%, X5R, 0603 0603ZD105KAT2A 1 C2 AVX Ceramic Capacitor 4.7 mF/25 V, 10%, X5R, 1206 12063D475KAT2A 1 C3 Taiyo Yuden Ceramic Capacitor 10 mF/ 35 V, 10%, X5R, 1210 GMK325BJ106KN-T 1 R1 Yageo SMT Resistor 0.1 W, 649 W, 0603 RC0603FR-07649RL 1 R2, R3 Yageo SMT Resistor, 0.1 W, 28 kW, 0603 RC0603FR-0728KL 2 R4, R6 Vishay Trimmer Potentiometer, 2.2 MW T93YB225K 2 R5 Yageo SMT Resistor, 0.1 W, 69.8 kW, 0603 RC0603FR-0769K8L 1 R7, R8 Yageo SMT Resistor, 0.1 W, 60.4 kW, 0603 RC0603FR-0760K4L 2 R9 Yageo SMT Resistor, 0.1 W, 100 W, 0603 RC0603FR-07100RL 1 R10 Tyco SMT Resistor, 0.1 W, 1 kW, 0603 RC0603FR-071KL 1 R11, R12, R14 Yageo SMT Resistor, 0.1 W, 100 kW, 0603 RC0603FR-07100KL 3 R13 Vishay Trimmer Potentiometer, 20 kW T73YE-20K-ND 1 L Coiltronics Inductor 47 mH, 1.08 A DR73-470-R 1 D NXP Schottky Diode, 60 V/1 A PMEG6010CEJ T/R 1 M1 ON Semiconductor N-Channel MOSFET, 60 V/115 mA 2N7002L 1 Z1 ON Semiconductor Zener Diode, 6.2 V MM3Z6V2 1 J1, J2 Tyco 2 Pin Header Connector 0.1” Pitch 640452-2 2 J5, J6 Tyco 4 Pin Header Connector 0.1” Pitch 640452-4 2 Mil-Max Pin Receptacle (Test Points) #0149-0-15-01-30-14-04-0 (or equiv) 6 LiteOn SMT Red LED LTST-T970KRKT 1 http://onsemi.com 2 CAT4106AGEVB ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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