- Cap-XX
Contents
1. 805 YA R20 4 805 805 3 R22 4 AW 1M R23 3 2 T93YB Vin 9 m3 2 330k uid FDV301N Ae BurstEN R2 SOT23 805 805 33k All information contained herein is strictly confidential APPEB1007 User Manual rev1 0 31 May 2005 CAP XX Pty Limited 2005 page 5 of 6 R26 33k 805 1V2 U5 Mosi D6 LumiLED Y ya LED Current a J7 LED Bypass o P s LEDpulse R37 680k av 805 3 AW ANN R40 C27 R38 100n 33k ANY 805 150k Vout 805 C29 TLC556CD SOIC av Offtime Trigger D5 i kd g is Y LumiLED gt Y dj BAT754 Rat P sors 33k 805 sw3 Flash J8 3v o o AW i 1v2 T LED Current B3SN R43 C22 3k3 100n ji J14 805 R27 805 1 2 i R44 100k 805 R28 Auto Flash av 39k s m PIS 805 R29 805 i 4 ZXM64NO2X W I5 MSOP8 150 805 E Jus 8v T R30 Offtime Trigger R047 805 b R33 B RM 10k 2k 2 T93YB E 2 T93YB z p R35 1v2 LEDpulse J10 Pulse M6 h i MN i5 6 FDV301N 1M5 O swi T 805 Pulse EN R39 ou 33k FDVSOIN lo osi Mr el i3 H Torch Vout FDV301N 3v R42 i SW2 Flash Torch mi ed ETIMDIGPE Torch Flash Ne es E o K H Q Torch Voltage FDVSOIN 5 aia 1 g EXT Mode j Mg H FovsoiN R45 FI 33k 805 All information contained herein is strictly conf2. Pressing SW3 will now cause 1A factory set to flow through each of the white LEDs D5 amp D6 for approximately 80ms If the button is held down continuously the flash will retrigger approximately every 2 5s This duty cycle is imposed due to the thermal constraints of the white LED GPRS GPRS mode is the same as TORCH mode ie flick the toggle switch SW2 to the left towards the TORCH pushbutton SW1 The factory set output voltage is 3 8V and it is available on the orange connector TB1 to be connected to a Power Amplifier or other pulsed load Circuit Description refer to schematics at the end of this manual Input Voltage The circuit is designed to operate from an external Li ion battery 4 2V 3 3V Vbat is the node connected to the battery via J2 J2 is to be connected to battery positive terminal Pins 1 and 2 of J2 are joined J3 is to be connected to battery negative terminal Pins 1 and 2 of J3 are joined A current limiting MOSFET M1 is not currently installed on the PCB and as such the bypass jumper J15 needs to be installed Indicating LED D2 is a red LED that indicates a source voltage is present Buck Boost Converter J1 needs to be jumpered for normal operation This jumper has been included so a wire loop can easily be inserted to measure the inductor current By measuring the inductor current and monitoring the voltage of pin 6 of U1 the average output current can also be determined All information cont
3. User s Manual Camera Phone Flash Evaluation Board Dual Cell APPEB1007 CA 2 x Units 9 10 12 Mars Road Tel 61 2 9420 0690 CAP XX Pty Limited A nen c RASA nem ADA 0 ATTI menm OTO Lane Cove NSW 2066 Fax 61 2 9420 0692 ABN 28 077 060 872 Australia WWW Cap xx com ACN 077 060 872 All information contained herein is strictly confidential APPEB1007 User Manual rev1 0 31 May 2005 page 1 of 6 CAP XX Pty Limited 2005 CAP X Camera Phone Flash Evaluation Board User s Manual Board Features FLASH mode with adjustable voltage and current TORCH MOVIE GPRS mode with adjustable voltage and current VOUT GND connector to evaluate GPRS Power Amplifier On board or External triggering On board or External white LEDs LED and inductor current measurement ability Auto run for flash or torch Quick Setup The following jumpers should be in place J1 J4 J5 J8 J9 J10 J12 and J15 Connect the positive terminal of a single cell Lithium lon rechargeable battery 3 3V 4 2V to any pin on J2 and connect the negative terminal to any pin of J3 The red LED D2 should come on immediately TORCH Flick the toggle switch SW2 to the left towards the TORCH pushbutton SW1 Pressing SW1 will now cause 100mA factory set to flow through each of the white LEDs D5 amp D6 With the factory setting of 100mA per white LED SW1 can be held down continuously FLASH Flick the toggle switch SW2 to the right towards the FLASH pushbutton SW3
4. ained herein is strictly confidential APPEB1007 User Manual rev1 0 31 May 2005 page 2 of 6 CAP XX Pty Limited 2005 CAP X The controller is an LTC3442 from Linear Technology Its Soft Start and Burst features are not currently utilized and as such J4 and J5 need to be jumpered to disable these features Inrush Current A discharged supercapacitor presents itself as a short circuit and therefore inrush current needs to be managed The LTC3442 has an average input current limiting feature and this has been set to approximately 1 5Amps by selecting R11 47KQ FLASH MODE For FLASH mode Vout is factory set to 4 5V This voltage can be reduced by turning R21 a 100k pot anticlockwise TORCH MODE The continuous current required for TORCH is FLASH current typically 200mA Vs 24 Therefore the voltage dropped across the white LEDs will be less To increase efficiency and to reduce thermal stress on the current limiting MOSFET M4 Vout should also be reduced Vout can be adjusted using R22 a 1M pot Vout is factory set to 3 8V The FLASH mode voltage needs to be adjusted prior to the TORCH mode voltage because the FLASH setting affects the TORCH setting but not vice versa If Jumper J12 is removed then the TORCH GPRS mode voltage is the same as that set in Flash Mode above and R22 has no effect GPRS MODE GPRS mode is the same as TORCH mode factory set to 3 8V The Vout setting adjusted using R22 has to satisfy both the ex
5. ation Please use the contact details on the header page or visit the CAP XX web site All information contained herein is strictly confidential APPEB1007 User Manual rev1 0 31 May 2005 page 4 of 6 CAP XX Pty Limited 2005 CAP X D2 Schematics J15 2 1 0 FET Bypass 805 J2 Vbat Ri 1 2 O oO Ca C5 Ed Te Ka ANN 4u7 4u7 4u7 805 805 805 R16 UB cis R13 C17 R15 470 d 805 EE 7 805 hai 805 805 gt gM4041 5 Vout a T X R1 TS1852 D3 33k R15 R19 1 22 1 22m 1 wv LYR976 805 t 1 22m 1 805 lio TC1185 505 SOT23 A R10 dk Vbat 805 o D4 BZX84C SOT23 L1 Lanne 4u7 5 MBROS20LT1 EY IHEP SOD123 Vout 2 at 4 5 S LTC3442 D1 R4 i R2 C2 c3 pi S Ut 300 DNP 4u7 4u7 Vin 4 swi sw2 L6 805 805 805 805 CON1 89 8 C7 GPRS n Vin Vout a o TI sHpN ss FB H2 ep EN C9 C10 C11 C19 al R7 10 S9 1i 805 E 100u 4u7 4u7 4u7 2 Am m 7 eyyy TPSC 805 805 805 o J4 805 3 Rt Burst f5 805 c8 a ji C15 Sande Pond R8 DNP 9 C14 R11 R12 DNP 805 R17 ya 4u7 805 2 T Vout 805 Torch Vout 805 805 805 i C16 805 umo um um Vout L 33k 1445 z M2 Cis T 95 o FDV3o2P 1 T R18 Burst DIS SOT23
6. idential APPEB1007 User Manual rev1 0 31 May 2005 CAP XX Pty Limited 2005 page 6 of 6
7. or other load can be connected to the board across Jumper J7 pin2 is ve When doing this also remove Jumpers J8 and J9 to disconnect the on board LEDs D5 amp D6 Alternatively more white LEDs Lumileds LXCL PWF1 can be connected in parallel to D5 amp D6 across J7 with Jumpers J8 and J9 in place External FLASH TORCH GPRS MODE Control An external control signal 3V connected to pin 2 of J13 will select TORCH MODE Flash PulseTimers External FLASH Pulse Control There are two on board 555 timers One generates the FLASH on time and the other generates the off time The FLASH trigger from these timers is connected to the Current Control circuitry via J10 J10 is jumpered for normal operation An external triggering circuit can be connected by removing the jumper from J10 and connecting the external signal to pin 1 of J10 There is a 33k pull down resistor on this pin A logic high signal on this pin will take a FLASH Make sure that this signal is 100ms long and does not occur for at least another 2s otherwise the thermal limits of the white LEDs will be violated and they will be destroyed Auto Flash If J14 is jumpered then the two 555 timers will be continuously triggered to generate an 80ms flash pulse every 2 5s Jumpering J14 has the same effect as pressing SW3 continuously Further Information CAP XX will be pleased to provide further information on the applications described here and on the use of supercapacitors in any applic
8. ternal Power Amplifer and have enough voltage headroom to drive the white LEDs in TORCH mode for the TORCH Mode current selected Current Control FLASH MODE The FLASH current is factory set to 2 0 Amps shared between two white LEDs It can be reduced by turning R33 10k pot anti clockwise The current in a single white LED should not exceed 1 Amp so if only one LED is to be used then the FLASH current should be reduced to 1 Amp or less prior to driving the single LED The FLASH current needs to be adjusted prior to the TORCH current because the FLASH setting affects the TORCH setting but not vice versa TORCH MODE The TORCH current is factory set at 200mA It can be reduced by turning R34 2k pot anti clockwise or increased by turning R34 clockwise Care should be taken not to increase Torch mode current gt 400mA total 200mA per LED so as not to overheat and destroy the LEDs GPRS MODE The maximum average load current is determined by the average input current limit which is set at 1 5Amps on the LTC3442 Buck Boost controller Assuming 85 efficiency maximum average load current 1 5A x Vbat Vout in TORCH mode x 85 Providing the DC DC converter provides sufficient average load current the supercapacitor will provide the peak currents All information contained herein is strictly confidential APPEB1007 User Manual rev1 0 31 May 2005 page 3 of 6 CAP XX Pty Limited 2005 CAP X External FLASH LED An External white LED
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