LM3561TMX National Semiconductor Corporation, LM3561TMX Datasheet
LM3561TMX
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LM3561TMX Summary of contents
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... VIN Monitor flag indicating the input voltage has fallen below the VIN Monitor threshold. Typical Application Circuits © 2011 National Semiconductor Corporation LM3561 The LM3561 is available in a tiny (1.6mm × 1.2mm × 0.6mm) 12-bump micro-SMD and operates over the -40°C to +85°C temperature range ...
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Application Circuit Component List Component Manufacturer L TDK COUT Murata CIN Murata LEDs Lumiled Connection Diagram Pin Descriptions Pin Name A1 GND Ground A2 IN Input Voltage Connection. Connect IN to the input supply and bypass to GND with a ...
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... Ordering Information Order Number Package LM3561TME TMD12AAA LM3561TMX TMD12AAA Top Marking 2 Lines: First line XY, where X is the single digit date code and Y is the die run code, Second line has the letters Supplied As No-Lead 250 units, Tape-and-Reel YES (NOPB) 3000 units, Tape-and-Reel www ...
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Absolute Maximum Ratings 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications OUT ...
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Symbol Parameter Quiescent Supply Current I Q into IN I Shutdown Supply Current SHDN I Standby Supply Current STBY Flash-to-Torch LED Current Settling Time t TX Torch-to-Flash LED Current Settling Time V VIN Monitor Trip Threshold IN_TH HWEN, STROBE, TX1/TORCH/GPIO1, ...
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Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and ...
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Timing FIGURE Timing 7 301139119 www.national.com ...
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Typical Performance Characteristics = 0.085Ω), MLP2520-1R0 (1µ LED Efficiency vs V Flash Brightness Codes (1111 - 1100) (Typical Application Circuit) LED Efficiency vs V Flash Brightness Codes (0111 - 0100) (Typical Application Circuit) LED Current ...
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LED Current Flash Brightness Codes (0111 - 0100) Shutdown Current GND) HWEN Indicator Current vs Headroom Voltage (VIN - VLED) Indicator Brightness Codes (111 - 100) Flash Brightness Codes (0011 - 0000) ...
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Startup into Flash Mode Max Flash Setting TX Interrupt Operation Torch Brightness Code (100) Flash Brightness Code (111) HWEN Operation www.national.com Torch Mode to Flash Mode Transition Torch Brightness Code (100) Flash Brightness Code (111) 30113961 Line Transient Flash Brightness ...
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V Monitor Response IN Flash Brightness Code (111) 3.0V Setting 30113964 11 www.national.com ...
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Block Diagram www.national.com 12 30113905 ...
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Circuit Description OVERVIEW The LM3561 is a high power white LED flash driver capable of delivering up to 600mA of LED current into a single white LED. The device incorporates a 2MHz constant frequency, synchronous boost converter, and a high ...
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Torch and Flash levels (32µs/step) until the programmed current is reached. FLASH TERMINATION Bit [2] of the Enable Register determines how the Flash pulse terminates. With this bit = '1' the Flash current pulse will only ...
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For example, when the LM3561 is engaged in a Flash event and TX2 is pulled high (active high polarity) the current source (LED) is forced into torch mode at the programmed Torch current setting. If ...
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LM3561 Timing Diagrams FIGURE 3. TX Event During a Flash Pulse (TX1/TORCH is an Active High TX Input) FIGURE 4. TX Event Before and After a Flash Event (TX1/TORCH is an Active High TX Input) www.national.com FIGURE 2. Torch to ...
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FIGURE 5. STROBE Input is Level Sensitive (Enable Register Bit [2] = '0') FIGURE 6. STROBE Input is Edge Sensitive (Enable Register Bit [2] = '1') 17 30113940 30113941 www.national.com ...
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FIGURE 7. TX2 Configured as an Active High Flash Interrupt and Set to Force Shutdown FIGURE 8. TX2 Configured as an Active Low TX Input and Set to Force Torch Mode www.national.com 30113942 30113943 18 ...
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FIGURE 9. Alternate External Torch Mode (TX1/TORCH Turns on Before STROBE; when TX1/TORCH goes low, Flash mode is initiated) FIGURE 10. Alternative External Torch Mode (STROBE Goes High Before TX1/TORCH, Same as Normal TX1 Operation) FIGURE 11. TX1/TORCH Pin is ...
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Flags Register and Fault Indicators The Flags Register contains the Interrupt and Fault indicators. Seven flags are available in the Flags Register. These include a Flash Timeout flag (TO), a Thermal Shutdown flag (TSD LED Failure flag (LEDF) ...
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I 2 C-Compatible Interface START AND STOP CONDITIONS The LM3561 is controlled via C-compatible interface. START and STOP conditions classify the beginning and end of the session. A START condition is defined as SDA ...
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I 2 C-COMPATIBLE CHIP ADDRESS The 7 bit I 2 C-compatible device address for the LM3561 is 1010011 (53). After the START condition, the I sends the 7-bit address followed by an eighth bit, read or write (R/W). R/W = ...
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Register Descriptions Register Name Enable Register Indicator Brightness Register GPIO Register VIN Monitor Register Torch Brightness Register Flash Brightness Register Flash Duration Register Flags Register Configuration Register 1 Configuration Register 2 ENABLE REGISTER (ADDRESS 0x10) The Enable Register contains the ...
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GPIO REGISTER (ADDRESS 0x20) The GPIO register contains the control bits which change the state of the TX1/TORCH/GPIO1 pin and the TX2/GPIO2 pin to general purpose I/O’s (GPIO’s). Bit 7 Bit 6 Bit 5 Not Used TX2/GPIO2/ TX2/GPIO2 INT Interrupt ...
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FLASH BRIGHTNESS REGISTER (ADDRESS 0XB0) The Flash Brightness Register contains the bits to program the LED current in flash mode. TABLE 7. Flash Brightness Register Bit Settings Bits [7:4] Not Used N/A Bits [3:0] Flash Current Settings 0000 = 36mA ...
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FLASH DURATION REGISTER (ADDRESS 0XC0) Bits [4:0] of the Flash Duration Register set the Flash timeout duration. Bit [5] sets the switch current limit. TABLE 8. Flash Timeout Duration Register Bit Settings Bit [7:6] Not Used Current Limit N/A 0 ...
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FLAGS REGISTER (ADDRESS 0XD0) The Flags Register holds the status of the flag bits indicating LED Failure, Over-Temperature, the Flash Timeout expiring, VIN Monitor Fault, LED over temperature (NTC), and a TX1 or TX2 interrupt. Bit 7 Bit 6 Bit ...
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CONFIGURATION REGISTER 2 (ADDRESS 0XF0) Configuration Register 2 contains the TX2 shutdown bit, the NTC shutdown bit, the Alternate External Torch Enable bit, and the VIN Monitor Shutdown bit. Bits [7:4] Not Used N/A www.national.com TABLE 11. Configuration Register 2 ...
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Applications Information OUTPUT CAPACITOR SELECTION The LM3561 is designed to operate with a at least a 10µF ceramic output capacitor. When the boost converter is run- ning the output capacitor supplies the load current during the boost converters on-time. When ...
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NTC THERMISTOR SELECTION Programming bit [4] of Configuration Register 1 with a (1) se- lects Thermal Comparator mode, making the LEDI/NTC pin a comparator input for flash LED thermal sensing. The ther- The NTC thermistor senses the LEDs temperature via ...
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VLEDI/NTC vs Temp (V FIGURE 16. Thermistor Resistive Divider Response vs Temperature Another useful equation for the thermistor resistive divider is developed by combining the equations for R and solving for temperature. This gives the following relation- ship. NTC THERMISTOR ...
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Layout Recommendations The high frequency and relatively large switching currents of the LM3561 make the choice of layout important. The follow- ing steps should be used as a reference to ensure the device is stable and maintains proper voltage and ...
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Physical Dimensions inches (millimeters) unless otherwise noted For Ordering, Refer to Ordering Information Table X1 = 1.615mm (±0.03mm 1.215mm (±0.03mm 0.6mm(±0.075mm) 12 Bump µSMD (0.4mm pitch) NS Package Number TMD12AAA 33 www.national.com ...
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