FAN5332ASX资料
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2 FAN5332A Rev. 1.0.1
www.fairchildsemi.com
元器件交易网www.cecb2b.com
FAN5332A High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch
Electrical Characteristics
Unless otherwise noted, VIN = 3.6V, No external load,TA = -40°C to +85°C, Typical values are at TA = 25°C, Test Circuit, Figure 3. Parameter
3 FAN5332A Rev. 1.0.1
www.fairchildsemi.com
元器件交易网www.cecb2b.com
FAN5332A High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch
Байду номын сангаас
Min
2.7 12 -40 1.6
Typ
Max
5.5 30
Unit
V V °C µF
25
85
Notes: 1. Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Absolute maximum ratings apply individually only, not in combination. 2. Junction to ambient thermal resistance, θJA, is a strong function of PCB material, board thickness, thickness and number of copper planes, number of via used, diameter of via used, available copper surface, and attached heat sink characteristics. 3. Using EIA/JESD22A114B (Human Body Model) and EIA/JESD22C101-A (Charge Device Model). 4. This load capacitance value is required for the loop stability. Tolerance, temperature variation, and voltage dependency of the capacitance must be considered. Typically a 2.2µF ceramic capacitor is required to achieve specified value at VOUT = 30V.
FAN5332A
VIN
SW
FB
3
R2 ON OFF 4 SHDN GND 2
Figure 1. Typical Application Diagram
©2004 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com
FAN5332A Rev. 1.0.1
Features
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 1.5MHz Switching Frequency Low Noise Adjustable Output Voltage Up to 1.5A Peak Switch Current 1.5W Output Power Capability Low Shutdown Current: <1µA Cycle-by-Cycle Current Limit Over-Voltage Protection Fixed -Frequency PWM Operation Soft Start Internal Compensation Thermal Shutdown 5-lead SOT-23 Package
元器件交易网www.cecb2b.com
FAN5332A High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch
August 2005
FAN5332A High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch
Feedback Pin. Feedback node that connects to an external voltage divider. Shutdown Control Pin. Logic HIGH enables, logic LOW disables the device. Input Voltage Pin.
5-Lead SOT-23
Figure 2. Pin Assignment
Pin Description
Pin No.
1 2 3 4 5
Pin Name
SW GND FB SHDN VIN Switching Node. Analog and Power Ground.
Pin Description
元器件交易网www.cecb2b.com
FAN5332A High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch
Pin Assignment
Top View SW GND FB VIN SHDN
Description
The FAN5332A is an LED driver that features fixed frequency mode operation and an integrated FET switch. The device’s high output power makes it suitable to drive flash LEDs in serial connections. This device is designed to operate at high switching frequencies in order to minimize switching noise measured at the battery terminal of hand-held communications equipment. Quiescent current in both normal and shutdown mode is designed to be minimal in order to extend battery life. Normal or shutdown mode can be selected by a logic level shutdown circuitry. The low ON-resistance of the internal N-channel switch ensures high efficiency and low power dissipation. A cycle-by-cycle current limit circuit keeps the peak current of the switch below a typical value of 1.5A. The FAN5332A is available in a 5-lead SOT23 package.
Min
Max
6.0 VIN + 0.3 35 300 150 150 200
Unit
V V V °C °C °C °C/W kV
Recommended Operating Conditions
Parameter
Input Voltage Output Voltage Operating Ambient Temperature Output Capacitance (Note 4)
Applications
■ ■ ■ ■ ■ ■ Cell Phones PDAs Handheld Equipment Display Bias LED Bias Flash LED
Typical Application
VIN CIN 10µF 5 1 R1 CF 82pF 2.7V to 5.5V L 6.8µH BAT54 COUT 2.2µF VOUT
Absolute Maximum Ratings (Note1)
Parameter
VIN to GND FB, SHDN to GND SW to GND Lead Soldering Temperature (10 seconds) Junction Temperature Storage Temperature Thermal Resistance (ΘJA) (Note 2) Electrostatic Discharge Protection (ESD) Level (Note 3) HBM CDM 2 1 -55 -0.3 -0.3
Output Voltage Accuracy Switch Current Limit Load Current Capability Switch On-resistance Quiescent Current OFF Mode Current Shutdown Threshold Shutdown Pin Bias Current Feedback Voltage Feedback Pin Bias Current Line Regulation Load Regulation Switching Frequency Maximum Duty Cycle Enable Delay Power on Delay Switch Leakage Current VIN = 2.7V, IOUT = 50mA, VOUT = 20.7V VIN = 2.7V, IOUT = 50mA, VOUT = 20.7V No Switching, VIN = 5.5V 3.2V < VIN < 5.5V, VOUT = 20.7V, TA= 25°C 0mA < ILoad < 75mA, VOUT = 20.7V 1.2 87 VIN = 3.2V VOUT > 18.5V, VIN ≥ 2.7V VOUT > 19.7V, VIN ≥ 3.2V, TON < 0.4Sec. VIN = 5V VIN = 3.6V VSHDN = 3.6V, No Switching VSHDN = 3.6V, Switching, VOUT = 20.7V VSHDN = 0V Device ON Device OFF VSHDN = 0V or VSHDN = 5.5V TA= 25°C 1.205 1 1.230 1 0.5 0.8 1.5 93 1.5 1.5 5 5 1 1.8 1.5 0.5 100 1.255 100 1.5