三合微科股份有限公司 SAMHOP Microelectronics Corp. The information in this document is subject to change without notice. c SAMHOP Microelectronics Corp. All Rights Reserved. 台北縣新店市民權路100號7樓 7F,No.100,Min-Chyuan Road, Hsintien, Taipei Hsien, Taiwan, R.O.C. TEL: 886-2-2218-3978/2820 FAX: 886-2-2218-3320 Email : [email protected] SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION GENERAL DESCRIPTION FEATURES The SM6802/ SM6803/ SM6804 are White/Blue LED Driver for Li-Ion Battery Application. No external component is required. Especially good for use Li-ion battery powered LCD display's backlight white LEDs. The special circuit design provides over 90% efficiency in low noise. * No external component required. * Programmable output current control, programming range 25% to 100% in 16 steps for LED brightness control. * Initial LED sink current 20 mA * 2channels (SOT-25), 3 channels (SOT-26/TSOP 6), 4 channels (MSOP-8) available. * 90% efficiency * Supply voltage range 3.0 V ~ 5.0 V * 0.1uA standby current The SM6802/SM6803/SM6804 is Integrated with 16-step programmable output sink current for LEDs brightness control. Target end applications are color LCD display, such as mobile phone with color display, smart phone, PDA, etc. Device Name Initial LED Sink Current Max. LED Sink Current LED Number SM6802 20mA 20mA 2 SM6803 SM6804 20mA 20mA 20mA 20mA 3 4 GENERAL APPLICATIONS * Small Size Color LCD Backlights * Mobile Phone, Smart Phone Keypad Backlights. PIN ASSIGNMENTS VDD 1 GND 2 EN/CTRL 3 5 4 LED1 LED2 VDD 1 6 LED1 GND 2 5 LED2 EN/CTRL 3 4 LED3 SM6802 SM6803 SOT-25 SOT-26 / TSOP 6 PGND 1 8 LED1 EN/CTRL 2 7 LED2 VDD 3 6 LED3 GND 4 5 LED4 SM6804 MSOP-8 Page 1 V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION TYPICAL APPLICATION Enable and Logic Brightness Control EN/CTRL VDD Li-Ion Battery VDD LED1 SM6804 LED2 LED3 LED4 GND GND ABSOLUTE MAXIMUM RATINGS Characteristic Input Voltage Output Voltage Voltage at all other pins Maximum Junction Temperature Symbol Rating Unit VDD -0.3 ~ 7.0 V VLEDn -0.3 ~ 7.0 V - -0.3 ~ 5.5 TJ V 150 o C C C Storage Temperature Range - -40 ~ 150 o Lead Temperature (soldering,10 seconds) - 260 o Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. POWER DISSIPATION TABLE Package θ°JA (oCW) TA>25oC Derating factor(mW/oC) SOT-25 220 4.5 568 363 295 SOT-26 220 4.5 568 363 295 MSOP-8 180 5.56 695 444 361 TA<25oC TA=70oC TA=85oC Power rating(mW) Power rating(mW) Power rating(mW) Note: Junction Temperature Calculation; TJ = TA+(PD* θJA) PD: Power Dissipation, TA: Ambient termperature, θJA : Thermal Resistance-Junction to Ambient The θJA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no ambient airflow. Page 2 V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION BLOCK DIAGRAM Current BIAS EN/CTRL Pulse Control Voltage Reference Output Step Control Driver 1 LED1 Driver 2 LED2 Driver 3 LED3 Driver 4 LED4 PIN DESCRIPTION (MSOP-8) Pin NO. I/O Pin Name 1 - PGND Function Description Power ground. This pin combined enable and output sink current programming function. Pulling this pin constantly high will enable the device, Pulsing this pin constantly to GND will disable the device, To pulsig this pin low will decrease or increase the output Sink current, Please refer to the application section for further informaiton. 2 I EN/CTRL 3 - VDD Power supply 4 - GND Ground 5~8 O LED1~LED4 Output pins, connect to LED's cathode. NOTE: Power ground and Ground pin must be short on PCB Board. Page 3 V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION RECOMMENDED OPERATING CONDITIONS Characteristic Symbol Condition Min. Typ. Supply Voltage VDD - 3 - 5 V Output Sink Current ILED - - - 25 mA Ta - -40 - +85 C Operating free-air temperature range Max. Unit DC ELECTRICAL CHARACTERISTICS (VDD = 3.7V, Ta = 25oC, No Load, unless otherwise noted) Characteristic "H" Level Symbol Condition Min. Typ. Max. VIH - 2 - - Input Voltage Unit Apply Pin V "L" Level VIL - - - 0.4 "H" Level IIH - -5.0 - +5.0 "L" Level IIL - -5.0 - +5.0 Short Low Pulse Width ts - 9 - 30 µs Hold Time Between Pulse tH - 10 - - µs Long Low Pulse Width tL - 125 - 175 µs Minimum Disable Low Time td - 480 - - µs VLEDL ILEDn=20mA - 100 120 mV - - 20 - mA LED Sink Current Tolerance ILEDn=20mA, Between IC - - +/-5 % LED Sink Current Deviation Between LED1~LED4 (Note 1) - - +/-3 % IDD - - 400 600 µA IDDSTBY - - 0.1 - µA Input Current µA LED Dropout Voltage LED Maximum Sink Current ILEDmax EN/CTRL LEDn Supply Current VDD Standby Supply Current Note 1: I LEDn (max) -ILEDn (average) and ILEDn(average)-ILEDn(min) Page 4 V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION APPLICATION INFORMATION Enable (EN/CTRL pin) The EN/CTRL pin serves two functions. One is the enable and disable of the device the other is the output sink current programming of the device. If the digital interface is not required the CTRL pin can be used as a standard enable pin for the device. Pulling the CTRL pin high will enable the device beginning sink current on LED pins. Pulling the CTRL pin to ground for a period of time > 480us will shutdown the device reducing the shutdown cruuent to typical 0.1 uA. This pin should not be left floating and need to be terminated. Digital interface (EN/CTRL pin) When power on the chip and pull high the EN/CTRL pin, the LED pins will start sink the initial sink current. The maximum LED sink current is ILEDMAX (20mA). Pulling the EN/CTRL pin low for a period of time can program the output sink current. When pulling the CTRL pin to "low" between 9 us to 30 us, the internal controller decreases its output sink current by one step (1 mA). When pulling the CTRL pin to "low" between 125us to 175us, the internal controller increases its output sink current by one step. There are total 16 steps that control LED output sink current range from ILEDMAX down to ILEDMAX/4. Between the "low" pulses, EN/CTRL should keep at "high" for at last 10 us. Decrease One Step Increase One Step Time 9~30us 125~175us Disable 480us Time Hold time Time 10us Time Supply Voltage and Li-ion battery low warning SM6802/3/4 works with supply voltage range from 3.0V to 5.0V. The white/blue LED forward voltage is in the range of 2.9V to 3.5V at 20mA current. The supply voltage range and LED forward voltage (Vf) should be set to fully ultilize Li-ion battery energy. For example, the maximum white LED forward voltage limit at 3.2V (@ 20mA) when Li-ion battery discharge reaches 3.275V (normally around 1%~3% power left in the battery). When Li-ion battery voltage is lower than the preset low level, the LED current (brightness) will start to decrease. Page 5 V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION TYPICAL OPERATION CHARACTERISTICS Quiescent Current vs. Supply Voltage Quiescent Current vs. Supply Voltage Quiescent Current (uA) Quiescent Current (uA) 300 250 200 150 100 50 0 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5 Supply Voltage (V) (V) Supply Voltage ILED vs. Supply Voltage ILED vs. Supply Voltage 25 LED Current (mA) LED Current (mA) 20 15 10 5 0 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5 Supply Voltage (V) Supply Voltage (V) Page 6 V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION TYPICAL OPERATION CHARACTERISTICS ILED vs. Brightness Control LED Current (mA) LED Current (mA) ILED vs. Brightness Control 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LED StepStep LED ILED vs. LEDn Dropout Voltage ILED vs. LEDn Dropout Voltage 25 LED Current (mA) LED Current (mA 20 15 10 5 0 0.01 0.1 1 10 LEDn Dropout Voltage(V) (V) LEDn Dropout Voltage Page 7 V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION PACKAGE Unit : mm SM6802L Surface Mount SOT-25 θ R D 4 E1 E L1 5 L b 1 2 3 C e L2 GAUGE PLANE e1 A2 A1 A θ2 y 4Xθ1 SYMBOL MIN. MOM. MAX. A 1.05 - 1.35 A1 0.05 - 0.15 A2 1.00 1.10 1.20 b 0.30 - 0.50 0.20 c 0.08 - D 2.80 2.90 3.00 E 2.60 2.80 3.00 E1 1.50 1.60 1.70 e 0.95 BSC. e1 1.90 BSC. L 0.35 L1 L2 Page 8 0.45 0.55 0.60 REF 0.25 BSC. R 0.10 - - y - - 0.10 θ 0° - 8° θ1 7°NOM θ2 5°NOM V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION PACKAGE Unit : mm SM6803L Surface Mount SOT-26 θ R D 5 1 2 4 E1 E L1 6 L b 3 C e L2 GAUGE PLANE e1 SYMBOL MIN. MOM. MAX. A 1.05 - 1.35 A1 0.05 - 0.15 A2 1.00 1.10 1.20 b 0.30 - 0.50 c 0.08 - 0.20 D 2.80 2.90 3.00 E 2.60 2.80 3.00 E1 1.50 1.60 1.70 A2 A1 A θ2 y 4Xθ1 e 0.95 BSC. e1 L 1.90 BSC. 0.35 L1 L2 Page 9 0.45 0.55 0.60 REF 0.25 BSC. R 0.10 - - y - - 0.10 θ 0° - 8° θ1 7°NOM θ2 5°NOM V.02 Jan 24,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION PACKAGE Unit : mm SM6804L 8 -Pin Plastic MSOP 8 5 1 E E1 "A" 4 0.65 BSC 0.15 TYP 0.30 D SEATING PLANE A1 0.25 A A2 GAUGE PLANE 0.05 L θ L1 DETAIL A SYMBOL MIN. MON. MAX. A - - 1.10 A1 0.00 - 0.15 A2 0.75 0.85 0.95 D 3.00 BSC. E 4.90 BSC. E1 L 3.00 BSC. 0.40 L1 θ 0.60 0.80 0.95 REF 0 - 8 Page 10 V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION PACKAGE Unit : mm SM6803T Surface Mount TSOP 6 θ R D 5 1 2 4 E1 E L1 6 L b C 3 e L2 e1 GAUGE PLANE SYMBOL MIN. MOM. MAX. A2 A1 A θ2 θ1 A 0.75 - 0.90 A1 0.00 - 0.10 A2 0.70 0.75 0.80 b 0.35 - 0.51 c 0.10 - 0.25 2.90 BSC. D E 2.80 BSC. E1 1.60 BSC. e 0.95 BSC. e1 L 1.90 BSC. 0.37 L1 L2 Page 11 - - 0.60 REF 0.25 BSC. R 0.10 θ 0° - - - 8° θ1 7°NOM θ2 5°NOM V.1.0 July 12,2007 SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION Ordering Information Package Marking Part Number ( Tape and Reel ) SOT-25 SM6802 SM6802 SOT-26 SM6803 SM6803 TSOP 6 SM6803T SM6803T MSOP 8 SM6804 SM6804 Package Marking Lead Free Part Number SOT-25 SM6802L SM6802L SOT-26 SM6803L SM6803L TSOP 6 SM6803T SM6803TL MSOP 8 SM6804L SM6804L Package Marking Green Part Number SOT-25 SM6802G SM6802G SOT-26 SM6803G SM6803G TSOP 6 SM6803T SM6803TG MSOP 8 SM6804G SM6804G Lead Free Information Green Information Page 12 V.1.0 July 12,2007