MP2487 MPS, MP2487 Datasheet
MP2487
Available stocks
Related parts for MP2487
MP2487 Summary of contents
Page 1
... EMI (Electromagnetic Interference) noise problems. The thermal shut down provides reliable, fault tolerant operations. A 12µA quiescent current in shutdown mode allows its use in battery-powered applications. The MP2487 is available in a SOIC8E package. TYPICAL APPLICATION C COM2 R C ...
Page 2
... Part Number* MP2487DN *For Tape & Reel, add suffix –Z (e.g.MP2487DN–Z); For RoHS compliant packaging, add suffix –LF (e.g.MP2487DN–LF–Z). ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ).....................–0.3V to +60V IN Switch Voltage (V )............ –0. BST to SW .....................................–0.3V to +5V All Other Pins .................................–0.3V to +5V ...
Page 3
... Minimum Off Time (5) Minimum On Time EN Up Threshold EN Threshold Hysteresis Note: 5) Guaranteed by design. MP2487 Rev. 0.9 1/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER = +25°C, unless otherwise noted. A Symbol Condition V 4.5V < V < 55V – V ...
Page 4
... MOSFET driver. Connect a bypass capacitor between this pin and SW pin. MP2487 Rev. 0.9 1/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER Connect exposed pad to GND plane for optimal www.MonolithicPower.com © 2010 MPS. All Rights Reserved. ...
Page 5
... EN Shutdown V EN 5V/div V SW 50V/div I LED 200mA/div I INDUCTOR 200mA/div MP2487 Rev. 0.9 1/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER PWM Dimming f =200Hz,D =50% PWM PWM V EN 5V/div V COMP 500mV/div V SW 20V/div I LED 200mA/div 2ms/div Efficiency vs ...
Page 6
... REFERENCE EN UVLO 0.5ms 0V2 COMP MP2487 Rev. 0.9 1/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER INTERNAL REGULATORS -- ISW + SS COMP OSCILLATOR GND Figure 1—Functional Block Diagram www.MonolithicPower.com © 2010 MPS. All Rights Reserved. VIN ...
Page 7
... When VIN is lower than 3.0V, the output decreases. Enable Control The MP2487 has a dedicated enable control pin (EN). With high enough input voltage, the chip can be enabled and disabled by EN which has positive logic. Its falling threshold is a precision 1 ...
Page 8
... VIN low and thermal shutdown. In the shutdown procedure, power MOSFET is turned off first to avoid any fault triggering. The COMP voltage and and IN the internal supply rail are then pulled down. Programmable Oscillator The MP2487 oscillating frequency is set by an external resistor, R ground. The value of R from: To get f =200kHz ...
Page 9
... LED MP2487 Rev. 0.9 1/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER Output Rectifier Diode The output rectifier diode supplies the current to the inductor when the high-side switch is off. To reduce losses due to the diode forward voltage and recovery times, use a Schottky diode ...
Page 10
... OUT For most application, a 2.2uF~4.7uF ceramic capacitor is recommended. Compensation Components MP2487 employs current mode control for easy compensation and fast transient response. The system stability and transient response are controlled through the COMP pin. COMP pin is the output of the internal error amplifier. A series ...
Page 11
... R COM MP2487 Rev. 0.9 1/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER External Bootstrap Diode An external bootstrap diode may enhance the efficiency of the regulator. In below cases, an external BST diode is recommended from the 5V to BST pin: f There rail available in the system ...
Page 12
... COM1 COM 22nF CONTROL R FREQ C 1nF FREQ R FB LED- Figure 3—700mA WLED Driver Application MP2487 Rev. 0.9 1/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER COMP VIN C IN MP2487 EN BST C BST 100nF FREQ SW D1 B180-7-F FB ...
Page 13
... Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP2487 Rev. 0.9 1/26/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER SOIC8E 0.150(3.80) 0.228(5.80) 0.157(4.00) 0.244(6.20) SEE DETAIL " ...