Texas Instruments TPS61059EVM-141 User Manual Download Page 5 | Manualshive

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/FLASH

LED Current

Setup

NOTE: CH1 = Enable Signal – pin 1 of J3; CH2 = Flash Signal – Pin 2 of J3; CH4 = LED Current

Figure 2. Timing From 200-mA Movie Light to 700-mA Flash

SLVU150 – January 2006

TPS61059EVM-141

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Summary of Contents for TPS61059EVM-141

Page 1: ...ing Between Flashes Using Pushbutton 8 6 LED Flash Interrupted With FLASH OFF Input 9 7 Efficiency 9 8 Assembly Layer 10 9 Top Layer Routing 11 10 Bottom Layer Routing 12 11 TPS6105xEVM 141 Schematic 13 List of Tables 1 J3 Pin Functions 2 2 HPA141A Bill of Materials 14 The Texas Instruments TPS6105xEVM 141 evaluation module EVM helps designers evaluate the operation and performance of the TPS61058...

Page 2: ...EN Output of timing circuit Drives EN pin of the TPS6105x Pin 2 FLASH Output of timing circuit Drives FLASH signal of TPS6105x A low on this pin produces a high current flash Pin 3 FLASH OFF Input to timing circuit A high on this pin immediately forces the TPS6105x to stop a high current flash This pin can be used to interrupt or mask off a high current flash The state of this pin does not effect ...

Page 3: ...uty cycle can be calculated using Equation 2 with the value of the timing capacitors C15 and C9 The average power dissipated in the sense resistor R7 is calculated using Equation 3 In Equation 3 Iflash is the flash current level and Inoflash is the current when not flashing which is zero or the torch current value depending on the setting of JP1 The average power dissipated in the LED is calculate...

Page 4: ...dissipation of the LED below the maximum power limitation of the LED The FLASH OFF input on J3 can be used to force the LED flash off during a flash sequence This is intended to turn the flash off in camera phones while the power amplifier is transmitting A logic 1 on pin 3 of J3 extinguishes the flash as long as the input is high This does not reset the timing of the timing circuit 2 2 5 Test Res...

Page 5: ...i com EN FLASH LED Current Setup NOTE CH1 Enable Signal pin 1 of J3 CH2 Flash Signal Pin 2 of J3 CH4 LED Current Figure 2 Timing From 200 mA Movie Light to 700 mA Flash SLVU150 January 2006 TPS61059EVM 141 5 ...

Page 6: ...www ti com EN FLASH LED Current Setup NOTE CH1 Enable Signal pin 1 of J3 CH2 Flash Signal Pin 2 of J3 CH4 LED Current Figure 3 Timing From LED Off to 700 mA Flash TPS61059EVM 141 6 SLVU150 January 2006 ...

Page 7: ...www ti com EN FLASH LED Current Setup NOTE CH1 Enable Signal pin 1 of J3 CH2 Flash Signal Pin 2 of J3 CH4 LED Current Figure 4 Timing Between Flashes SLVU150 January 2006 TPS61059EVM 141 7 ...

Page 8: ...utton is ignored for approximately 3 2 seconds from end of last flash Setup NOTE CH1 Enable Signal pin 1 of J3 CH2 Flash Signal pin 2 of J3 CH3 Pushbutton Signal pin A1 of U4 Figure 5 Timing Between Flashes Using Pushbutton TPS61059EVM 141 8 SLVU150 January 2006 ...

Page 9: ...0 30 40 50 60 70 80 90 100 2 5 3 0 3 5 4 0 4 5 5 0 5 5 LED Power Efficiency P LED P IN ILED 700 mA VF 4 1 V Setup NOTE CH1 FLASH pin 2 of J3 CH2 FLASH OFF Pin 3 of J3 LED Current Figure 6 LED Flash Interrupted With FLASH OFF Input Figure 7 Efficiency SLVU150 January 2006 TPS61059EVM 141 9 ...

Page 10: ... Layout This section provides the TPS6105xEVM 141 board layout and illustrations Figure 8 Figure 9 and Figure 10 show the board layout for the TPS6105xEVM 141 printed circuit board Figure 8 Assembly Layer TPS61059EVM 141 10 SLVU150 January 2006 ...

Page 11: ...www ti com Board Layout Figure 9 Top Layer Routing SLVU150 January 2006 TPS61059EVM 141 11 ...

Page 12: ... 4 Schematic and Bill of Materials Schematic and Bill of Materials Figure 10 Bottom Layer Routing This section provides the TPS6105xEVM 141 schematic and bill of materials TPS61059EVM 141 12 SLVU150 January 2006 ...

Page 13: ...www ti com 4 1 Schematic Schematic and Bill of Materials Figure 11 TPS6105xEVM 141 Schematic SLVU150 January 2006 TPS61059EVM 141 13 ...

Page 14: ...ader 2 pin 100mil spacing 36 pin strip 0 100 2 PTC36SAAN Sullins 1 L1 4 7 µH Inductor SMT 1 1A 120 mΩ 0 177 0 185 VLF5014AT 4R7M1R1 TDK 1 R1 22 1k Resistor Chip 1 16W 1 0402 Std Std 2 R11 R12 0 Resistor Chip 1 16W 1 0603 Std Std 1 R13 10k Resistor Chip 1 16W 1 0603 Std Std 0 R17 Open Resistor Chip 1 10W 1 0805 0 R18 Open Resistor Chip 1 16W 1 0402 1 R2 68 1k Resistor Chip 1 16W 1 0402 Std Std 1 R3...

Page 15: ...d TI harmless against any damages liabilities or costs resulting from any claim suit or proceeding arising from user s handling or use of the EVM including but not limited to i claims that the EVM infringes a third party s intellectual property and ii claims arising from the user s use or handling of the EVM TI shall have no responsibility to defend any such claim suit or proceeding User assumes a...

Page 16: ...ese components include but are not limited to linear regulators switching transistors pass transistors and current sense resistors These types of devices can be identified using the EVM schematic located in the EVM User s Guide When placing measurement probes near these devices during operation please be aware that these devices may be very warm to the touch Mailing Address Texas Instruments Post ...

Page 17: ...tute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction is...

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