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HFC0400GS

HFC0400GS

  • 厂商:

    MPS(美国芯源)

  • 封装:

    SOIC8_150MIL_7Pin

  • 描述:

    ICREGCTRLRFLYBKPWM8SOIC

  • 数据手册
  • 价格&库存
HFC0400GS 数据手册
MP2481 36V, 1.2A, 1.4MHz White LED Driver The Future of Analog IC Technology DESCRIPTION FEATURES   The MP2481 is a 36V, 1.2A, white LED driver suitable for either step-down or inverting step-up/down applications. It achieves 1.2A peak output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes thermal shutdown, cycle-by-cycle peak current limiting, input over voltage protection, open strings protection and output short circuit protection. The MP2481 incorporates both DC and PWM dimming onto a single control pin. The separate input reference ground pin allows for direct enable and/or dimming control for a positive to negative power conversion. The MP2481 requires a minimum number of readily available standard external components and is available in 8-pin MSOP8E package.                EVALUATION BOARD REFERENCE Board Number Mode EV2481-H-00A Step-down EV2481-H-01A Step-up/down 1.2A Maximum Output Current Unique Step-up/down Operation (BuckBoost Mode) Wide 4.5V to 36V Operating Input Range for Step-Down Applications (Buck Mode) 0.30Ω Internal Power MOSFET Switch Fixed 1.4MHz Frequency Analog and PWM Dimming 0.2V Reference Voltage Up to 95% Efficiency 5μA Shutdown Mode No minimum LED required Stable with Low ESR Output Ceramic Capacitors Cycle-by-Cycle Over Current Protection Thermal Shutdown Protection Open Strings Protection Input Over Voltage Protection Output Short Circuit Protection Available in 8-Pin MSOP8E Package APPLICATIONS       General LED Illuminations LCD Backlight Panels Handheld Computers Automotive Internal Lighting Portable Multimedia Players Portable GPS Devices All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION (STEP-UP/DOWN APPLICATION) Efficiency vs. Input Voltage Step-up/down Application 3 VIN OVP VDD BST 7 90 Cbs L1 85 SW 6 C1 D1 MP2481 EN/DIM 5 EN/DIM GND 6 INGND VSS 2 FB C2 R1 4 R2 RS EFFICIENCY (%) 1 4 series,400mA 80 3 series,400mA 75 3 series,9 paralleded,180mA total 70 65 60 0 5 10 15 20 25 30 INPUT VOLTAGE (V) MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 1 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER ORDERING INFORMATION Part Number* Package Top Marking MP2481DH MSOP8E 2481D * For Tape & Reel, add suffix –Z (e.g. MP2481DH–Z). For RoHS compliant packaging, add suffix –LF (e.g. MP2481DH–LF–Z) PACKAGE REFERENCE TOP VIEW VDD 1 8 SW VSS 2 7 BST OVP 3 6 INGND FB 4 5 EN/DIM EXPOSED PAD ON BACK SIDE* * Do not Connect to Input Ground (INGND) for Boost, Buck-Boost applications ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance (4) Supply Voltage VDD – VSS ............................. 40V VSW – VSS .............................. –0.3V to VIN + 0.3V VBST........................................................ VSW + 6V VOVP – VSS....................................... –0.3V to +6V VEN – VINGND .................................... –0.3V to +6V VDIM – VINGND ................................... –0.3V to +6V VINGND – VSS .................................... –0.3V to 40V Continuous Power Dissipation (TA = +25°C) (2) ………………………………………………....2.3W Junction Temperature ............................... 150C Lead Temperature .................................... 260C Storage Temperature ............... –65C to +150C MSOP8E (Exposed Pad) ........ 55 ...... 12... C/W θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. Recommended Operating Conditions (3) Supply Voltage VDD – VSS ................ 4.5V to 36V Operating Junct. Temp (TJ) ..... –40C to +125C MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER ELECTRICAL CHARACTERISTICS VIN = 12V, TA = +25C, all voltages with respect to VSS, unless otherwise noted. Parameters Symbol Condition Feedback Voltage VFB 4.5V  VIN  36V Feedback Current IFB VFB = 0.2V Switch-On Resistance (5) RDS(ON) Switch Leakage VEN = 0V, VSW = 0V Switch Current Limit (5) Oscillator Frequency fSW VFB = 0.1V Fold-back Frequency VOVP < 0.4V Maximum Duty Cycle VFB = 0.1V Minimum On-Time (5) tON Under Voltage Lockout Threshold Rising Under Voltage Lockout Threshold Hysteresis VEN = 2V EN Input Current VEN = 0V EN OFF Threshold (w/Respect to INGND) VEN Falling EN ON Threshold (w/Respect to INGND) VEN Rising Supply Current (Quiescent) IQ VEN = 2V, VFB = 1V Thermal Shutdown (5) Open LED OV Threshold VOVP, th Open LED OV Hysteresis VOVP, hys Min 0.187 Typ 0.203 0.2 0.30 Max 0.219 10 1.0 3.1 2.0 1.4 120 89 100 3.4 1.8 3.7 Units V μA Ω μA A MHz kHz % ns V 480 mV 2.0 0.1 μA 0.4 0.6 150 1.23 0.1 0.7 1.1 V V mA °C V V Note: 5) Guaranteed by design. MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 3 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER PIN FUNCTIONS Pin # Name 1 VDD 2 VSS 3 OVP 4 FB 5 EN/DIM 6 INGND 7 BST 8 SW MP2481 Rev. 1.5 8/24/2020 Description Supply Voltage. The MP2481 operates from a +4.5V to +36V unregulated input (with respect to VSS). C1 is needed to prevent large voltage spikes from appearing at the input. Power Return Pin. Connect to the lowest potential in the circuit, which is typically the anode of the Schottky rectifier. This pin is the voltage reference for the regulated output voltage. For this reason care must be taken in its layout. This node should be placed outside of the D1 to C1 ground path to prevent switching current spikes from inducing voltage noise into the part. The exposed pad is also connected to this pin. Over Voltage Protection Pin. Use one external resistor voltage divider to program OVP threshold. When the OVP pin voltage (with respect to VSS) is lower than 0.4V, the chip frequency will be folded back. Program the OVP pin voltage from 0.4V to 1.23V for normal operation. When the OVP pin voltage reaches the shutdown threshold 1.23V, the switch will be turned off LED Current Feedback Input. MP2481 regulates the voltage across the current sensing resistor between FB and VSS. Connect the current sensing resistor from the bottom of the LED strings to VSS. The FB pin is connected to the bottom of the LED strings. The regulation voltage is 0.2V. On/Off Control Input and Dimming Command Input. A voltage greater than 0.7V will turn on the chip. When the EN/DIM pin voltage (with respect to INGND) rises from 0.7V to 1.4V, the LED current will change from 0% to 100% of the maximum LED current. To use PWM dimming, apply a 100Hz to 1kHz square wave signal with amplitude greater than 1.4V to this pin. Input Ground Reference. This pin is the reference for the EN/DIM signal. Bootstrap. A capacitor is connected between SW and BST pins to form a floating supply across the power switch driver. This capacitor is needed to drive the power switch’s gate above the supply voltage. Switch Output. SW is the source of the internal MOSFET switch. Connect to the power inductor and cathode of the Schottky rectifier. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 4 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER TYPICAL PERFORMANCE CHARACTERISTICS VIN=12V, ILED=1A, one 5W WLED, Step-down application (refer to Figure 6), unless otherwise noted. Steady State Operation Open Load Protection PWM Dimming fPWM=1kHz,DPWM=50% VSW 10V/div. VSW 10V/div. VFB 200mV/div. VOUT VOUT 2V/div. VPWM 5V/div. VSW 10V/div. AC Coupled 200mV/div. VOUT 2V/div. ILED 500mA/div. IINDUCTOR 500mA/div. ILED 1A/div. 400ns/div 4 2 Efficiency vs. Input Voltage Short Circuit Protection Short LED+ to INGND 100 1.0 90 LED CURRENT (A) EFFICIENCY (%) IINDUCTOR 500mA/div. 85 80 75 1 WLED,500mA 1 WLED,1A 70 65 60 0.8 0.6 0.4 0.2 0 0 4 1.2 2 WLEDs in series,500mA 3 WLEDs in series,500mA 95 VSW 10V/div. LED Current vs. Analog Dimming Voltage 10 20 30 INPUT VOLTAGE (V) 40 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 ANALOG DIMMING VOLTAGE (V) LED Current vs. PWM Dimming Duty fPWM=1kHz 1.2 LED CURRENT (A) 1.0 0.8 0.6 0.4 0.2 0 0 0.2 0.4 0.6 0.8 1.0 PWM Dimming Duty MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 5 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=12V, ILED=180mA, 3 WLEDs in series, 9 strings, Step-up/down application (refer to Figure 7), unless otherwise noted. Steady State Operation Open Load Protection PWM Dimming fPWM=1kHz,DPWM=50% VSW 20V/div. VSW 10V/div. VSW 20V/div. VPWM 5V/div. VSS VSS 5V/div. AC Coupled 200mV/div. VSS 2V/div. ILED 200mA/div. ILED 200mA/div. IINDUCTOR 500mA/div. 400ns/div 4 2 LED Current vs.Analog Dimming Voltage Efficiency vs. Input Voltage Short Circuit Protection Short LED+ to VSS 90 200 EFFICIENCY (%) VSW 10V/div. IINDUCTOR 500mA/div. 4 series,400mA 80 3 series,400mA 75 3 series,9 paralleded,180mA total 70 65 60 4 LED CURRENT (mA) 180 85 160 140 120 100 80 60 40 20 0 5 10 15 20 25 INPUT VOLTAGE (V) 30 0 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 ANALOG DIMMING VOLTAGE (V) LED Current vs. PWM Dimming Duty fPWM=1kHz 200 LED CURRENT (mA) 180 160 140 120 100 80 60 40 20 0 0 0.2 0.4 0.6 0.8 1.0 PWM Dimming Duty MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 6 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER FUNCTION BLOCK DIAGRAM VDD POR& REGULATOR EN/DIM 4.0V x20 RAMP GENERATOR CURRENT SENSE AMPLIFIER -+ EN ENABLE D REGULATOR BST OVP DIMMING CONTROL INGND OSCILLATOR 1.4MHz/120KHz S REFERENCE 1pF (VEN-0.7)/3.5 27pF SOFTSTART FB 0.2V + + EA -- ERROR AMPLIFIER + -- Q M1 DRIVER R CURRENT LIMIT COMPARATOR + -- PWM COMPARATOR SW R R VDD + + -- OVP 1.2V VSS Figure 1—Function Block Diagram MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 7 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER OPERATION The MP2481 is a current mode regulator. The EA output voltage is proportional to the peak inductor current. At the beginning of a cycle, M1 is off. The EA output voltage is higher than the current sense amplifier output, and the current comparator’s output is low. The rising edge of the 1.4MHz CLK signal sets the RS Flip-Flop. Its output turns on M1 thus connecting the SW pin and inductor to the input supply. The increasing inductor current is sensed and amplified by the Current Sense Amplifier. Ramp compensation is summed to the Current Sense Amplifier output and compared to the Error Amplifier output by the PWM Comparator. When the sum of the Current Sense Amplifier output and the Slope Compensation signal exceeds the EA output voltage, the RS Flip-Flop is reset and M1 is turned off. The external Schottky rectifier diode (D1) conducts the inductor current. If the sum of the Current Sense Amplifier output and the Slope Compensation signal does not exceed the EA output for a whole cycle, then the falling edge of the CLK resets the Flip-Flop. The output of the Error Amplifier integrates the voltage difference between the feedback and the 0.2V reference. The polarity is such that a FB pin voltage lower than 0.2V increases the EA output voltage. Since the EA output voltage is proportional to the peak inductor current, an increase in its voltage also increases current delivered to the output. Open Strings Protection If LED strings are open, there is no voltage on the FB pin. The duty cycle increases until V(VDD) - V(VSS) reaches to 38V or V(OVP) - V(VSS) reaches the shutdown threshold 1.23V. Then the top switch is kept off. It will be switching again when the voltage V(VDD) - V(VSS) and V(OVP) V(VSS) decreases sufficiently. Spike Voltage Suppression and EMI Improvement The spike voltage of the VDD-to-SW should be well limited to make sure it’s under the ABS of VDD-to-SW. The high di/dt caused by MOS on/off is the source of spike voltage, which generates high spike voltage on the parasitic MP2481 Rev. 1.5 8/24/2020 inductor and it’s also the source of the EMI. Decrease the parasitic inductance is the most effective method to improve the spike voltage and EMI. As Figure 2 shows, the input capacitor C2 together with the output capacitor C5 offers a bypass paths for high di/dt, so these two capacitor should be placed very close to the chip with short, direct and wide traces. If the spike voltage still cannot meet the request, or EMI is not so good, a capacitor connected between VDD and VSS can be used to further shorten the high di/dt path. It should be placed as close as possible to the chip too, and the traces should be short and wide. But a schottky diode D5 paralleled with C5 should be used to clamp the voltage between VSS and INGND to make sure it is under the ABS. Q1 VDD L C2 D1 C1 VSS Vout- D2 C5 INGND Vout+ Figure 2— spike voltage and EMI improvement Dimming Control The MP2481 allows both DC and PWM dimming. When V(EN/DIM) – V(INGND) is less than 0.4V, the chip is turned off. For analog dimming, when V(EN/DIM) – V(INGND) rises from 0.7V to 1.4V, the LED current will change from 0% to 100% of the maximum LED current. If V(EN/DIM) – V(INGND) is higher than 1.4V, maximum LED current is generated. If a PWM signal is used, its amplitude V (EN/DIM) – V (INGND) must exceed 1.4V. The MP2481 is designed with an internal EN shut-down delay (see Figure 3). If EN is pulled down, the FB reference drops to zero immediately and the LED current decreases. But the IC keeps internal logic on for about 2.5ms. In this period, the IC may switch with very short pulses in pulse-skipping mode, while the LED current is zero since the FB reference is zero. It has benefit that the IC will start up more quickly www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 8 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER without delay when next PWM duty comes. This function offers the possibility to extend the PWM dimming frequency and also the minimum PWM on time for further dimming depth. Figure 3— Internal EN Shut-down Delay Function Waveform Diagram MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 9 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER APPLICATION INFORMATION Setting the LED Current The external resistor is used to set the maximum LED current (see the schematic on front page) through the use of the equation: RSENSE = 0.200V ILED Setting the OVP point To make sure the chip functions properly, the Over Voltage Protection (OVP) resistor divider must be set with proper value, the recommended OVP point is about 1.3~1.5 times higher than the output voltage for normal operation and over voltage protection. Selecting the Inductor (Step-Down Applications, see Figure 6) A 3.3µH to 10µH inductor with a DC current rating of at least 25% higher than the maximum load current is recommended for most applications. For highest efficiency, the inductor’s DC resistance should be less than 200mΩ. Refer to Table 1 for suggested surface mount inductors. For most designs, the required inductance value can be derived from the following equation. L VOUT  ( VIN  VOUT ) VIN  IL  f SW Where VIN is the lowest input voltage, VOUT is the output voltage, ∆IL is the inductor ripple current. Choose the inductor ripple current to be 30% of the maximum load current. The maximum inductor peak current is calculated from: IL(MAX )  ILOAD  IL 2 If the calculation of above equations results in an inductance greater than 10uH, a 10uH inductor is still preferred. Under light load conditions below 100mA, a larger inductance is recommended for improved efficiency. Also note that the maximum recommended load current is 1A if the duty cycle exceeds 35%. (Step up/Down Applications, see Figure 7) Operation at step-up/down mode, the recommended inductance value can be derived from the following equation: L= -VOUT  VIN (VIN - VOUT )  ∆IL  fSW When VIN is the lowest input voltage, VOUT is the output voltage (negative), ∆IL is the inductor ripple current. For most step-up/down applications, a 3.3uH to 22uH with suitable DC current rating is recommended. See Table 1 for suggested inductors. Selecting the Input Capacitor The input capacitor reduces the surge current drawn from the input supply and the switching noise from the device. The input capacitor impedance at the switching frequency should be less than the input source impedance to prevent high frequency switching current from passing through the input. Ceramic capacitors with X5R or X7R dielectrics are highly recommended because of their low ESR and small temperature coefficients. For most applications, a 4.7µF capacitor is sufficient. Table 1—Suggested Surface Mount Inductors Manufacturer Part Number Inductance(µH) Max DCR(Ω) Toko Sumida Wurth Electronics A921CY-4R7M CDRH4D28C/LD 7440530047 4.7 4.7 4.7 0.027 0.036 0.038 MP2481 Rev. 1.5 8/24/2020 Current Rating (A) 1.66 1.5 2.0 Dimensions L x W x H (mm3) 6 x 6.3 x 3 5.1 x 5.1 x 3 5.8 x 5.8 x 2.8 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 10 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER Selecting the Output Capacitor The output capacitor keeps the output voltage ripple small and ensures feedback loop stability. The output capacitor impedance should be low at the switching frequency. Ceramic capacitors with X5R or X7R dielectrics are recommended for their low ESR characteristics. For most applications, a 2.2µF ceramic capacitor will be sufficient. PCB Layout Considerations Efficient PCB layout is critical for stable operation. For best results, please refer to the guidelines below: Q1 VDD L C2 C1 D1 Make it small VSS Vout- D2 C5 INGND Vout+ Figure 5— Buck-boost layout without VSS capacitor 1. The high di/dt paths (VSS, VDD and SW) should be placed very close to the device with short, direct and wide traces. 2. The input capacitor needs to be as close as possible to the VDD and VSS pins. Q1 VDD SW L C2 D1 C1 VSS Make it small VoutC5 INGND Vout+ Figure 4—Buck-boost layout without VSS capacitor 3. The external feedback resistors should be placed next to the FB pin. 4. Keep the switch node traces short and away from the feedback network. 5. Add a capacitor between VSS and VDD when the capacitor between VDD and INGND cannot be placed as close to the devise as possible. Make sure the capacitor between VSS and VDD is very close to the device and the traces are short and wife. MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 11 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER TYPICAL APPLICATION CIRCUITS 3 1 VIN OVP BST VDD 7 C4 10nF L1 4.7uH LED+ SW 6 C2 4.7µ/50V D1 C2 B140 2.2uF/25V MP2481 R1 39kΩ 5 EN/DIM EN/DIM 6 INGND GND VSS FB R2 10kΩ 4 LED- R6 0.2Ω/1% 2 Figure 6—Step-Down White LED Driver Application 3 1 VIN C1 1µ/50V OVP VDD BST 7 C4 10nF L1 4.7uH LED+ SW 6 C2 4.7µ/50V D1 C2 B140 2.2uF/25V MP2481 EN/DIM 5 EN/DIM GND 6 INGND D2 B140 VSS 2 FB 4 R1 39kΩ R2 10kΩ LED- R6 0.2Ω/1% Figure 7—Step-up/down White LED Driver Application MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 12 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER PACKAGE INFORMATION MSOP8E W/ EXPOSED PAD 0.087(2.20) 0.099(2.50) 0.114(2.90) 0.122(3.10) 5 8 0.114(2.90) 0.122(3.10) PIN 1 ID (NOTE 5) 0.187(4.75) 0.199(5.05) 0.062(1.58) 0.074(1.88) Exposed Pad 0.010(0.25) 0.014(0.35) 4 1 0.0256(0.65)BSC BOTTOM VIEW TOP VIEW GAUGE PLANE 0.010(0.25) 0.030(0.75) 0.037(0.95) 0.043(1.10)MAX SEATING PLANE 0.000(0.00) 0.006(0.15) FRONT VIEW 0.016(0.40) 0.026(0.65) 0.004(0.10) 0.008(0.20) NOTE: 0.181(4.60) 0.040(1.00) 0.016(0.40) 0 -6 o SIDE VIEW 0.100(2.54) 0.075(1.90) o 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) PIN 1 IDENTIFICATION HAS HALF OR FULL CIRCLE OPTION. 6) DRAWING MEETS JEDEC MO-187, VARIATION AA-T. 7) DRAWING IS NOT TO SCALE. 0.0256(0.65)BSC RECOMMENDED LAND PATTERN MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 13 MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER Revision History Revision # 1.5 Revision Date 08/24/2020 Description Pages Updated 1. Updated the typical application Page 1 2. Updated the PCB layout consideration page 11 3. Updated the typical application circuit page 12 NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party 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. MP2481 Rev. 1.5 8/24/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 14
HFC0400GS 价格&库存

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