LX1992-02W EVAL KIT MICROSEMI, LX1992-02W EVAL KIT Datasheet
LX1992-02W EVAL KIT
Specifications of LX1992-02W EVAL KIT
LX1992-02W EVAL KIT Summary of contents
Page 1
... Designers can make this adjustment via an analog reference signal or a direct PWM generated signal applied to the ADJ pin and any PWM amplitude is easily accommodated with a single external resistor. is The LX1992 is available in both the 8- Pin MSOP, and the miniature 8-Pin MLP requiring minimal PCB area µ ...
Page 2
... MBIENT JA , θ C 39°C/W ASE JC , θ A 41°C/W MBIENT JA , θ C 5.2°C/W ASE θ ESCRIPTION for normal operation. Microsemi Linfinity Microelectronics Division LX1992 RODUCTION ATA HEET SRC 2 7 GND RMS 4 5 ADJ DU P ACK AGE (Top View) SRC 1 8 DRV GND 2 ...
Page 3
... Control Driver Logic B Shutdown Logic Microsemi Linfinity Microelectronics Division LX1992 D S RODUCTION ATA HEET ≤ ≤ T 70°C except where A and V = 300mV ADJ LX1992 Min Typ Max 1.6 6.0 1 100 0.2 0.5 275 300 325 -100 100 0 -150 0 -50 50 1.6 0.4 3 ...
Page 4
... High Efficiency LED Driver P RODUCTION µ 1206 Case Size DRV SHDN LX1992 FB CS ADJ Ω µ 1206 Case Size DRV SHDN LX1992 FB ADJ Ω Microsemi Linfinity Microelectronics Division LX1992 D S ATA HEET C 1 4.7 F µ Ω 4.7 F µ Ω Page 4 ...
Page 5
... The adjustment voltage level is selectable (with limited accuracy) by implementing the voltage divider created between the external series resistor and the internal 2.5MΩ resistor. Disabling the LX1992 is achieved by driving the SHDN pin with a low-level logic signal thus reducing the device power consumption to less than 0.5µA (typ). ...
Page 6
... LX1992 IC may be driven from a separate DC source via the VCC input. The output current (i.e., LED brightness) is controlled by adjusting the on-board potentiometer. brightness adjustment circuit from VBAT or via a separate voltage source by selecting the appropriate jumper position (see Table 2). Optional external adjustment of the output ...
Page 7
... Table 1: Input and Ouput Pin Assignments Main power supply for output. (Set external current limit to 0.5A) LX1992 power. May be strapped to VBAT or use a separate supply if VCC jumper is in the SEP position. Do not power output from VCC pin on board.. Potentiometer power. May be strapped to VBAT or use a separate supply if VPOT jumper is in the SEP position ...
Page 8
... Table 3: Factory Installed Component List for the LX1992 Evaluation Board Part Quantity Reference 1 Q1 Mosfet, N-Channel, 25V, SOT23 Type SMT 1 CR1 Rectifier, Schottky, 1A, 20V, Powermite Type SMT 1 L1 Inductor, 47uH, 540mA, SMT 2 C1, C2 Capacitor, Ceramic X5R, 4.7uF, 25V, 1210 Type SMT ...
Page 9
... Configuration: V Note: Data taken from LXE1992 Evaluation Board Efficiency Measurement Hint: When doing an efficiency evaluation using the LX1992 Evaluation Board, VPOT should be driven by a separate voltage supply to account for losses associated with the onboard reference (i.e., the 1.25V shunt regulator and 1K Ω resistor). This circuit will have VBAT - 1.25V across it and at the higher input voltages the 1K Ω ...
Page 10
... A Internally Connected together, but isolated Θ from all other terminals A1 Note: 1. Dimensions do not include mold flash or protrusions; 0.155mm(.006”) on any side. shall not include solder coverage. Microsemi Linfinity Microelectronics Division LX1992 RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX 2 ...
Page 11
... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2000 Rev. 1.1b, 2005-03-03 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® High Efficiency LED Driver P RODUCTION Microsemi Linfinity Microelectronics Division LX1992 D S ATA HEET Page 11 ...