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SM6804 Dataheets PDF



Part Number SM6804
Manufacturers SamHop Microelectronics
Logo SamHop Microelectronics
Description (SM6802 - SM6804) WHITE / BLUE LED DRIVER
Datasheet SM6804 DatasheetSM6804 Datasheet (PDF)

www.DataSheet4U.net SAMHOP Microelectronics Corp. The information in this document is subject to change without notice. c SAMHOP Microelectronics Corp. All Rights Reserved. 1007 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] www.DataSheet4U.net www.DataSheet4U.net SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION GENERAL DESCRIPTION The SM6802/ SM6803/ SM6804 ar.

  SM6804   SM6804


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www.DataSheet4U.net SAMHOP Microelectronics Corp. The information in this document is subject to change without notice. c SAMHOP Microelectronics Corp. All Rights Reserved. 1007 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] www.DataSheet4U.net www.DataSheet4U.net SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION GENERAL DESCRIPTION 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. 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 FEATURES * 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 LED Number SM6802 SM6803 SM6804 20mA 20mA 20mA 20mA 20mA 20mA 2 3 4 GENERAL APPLICATIONS * Small Size Color LCD Backlights * Mobile Phone, Smart Phone Keypad Backlights. PIN ASSIGNMENTS VDD GND EN/CTRL 1 2 3 5 4 LED1 LED2 VDD GND EN/CTRL 1 2 3 6 5 4 LED1 LED2 LED3 SM6802 SOT-25 SM6803 SOT-26 / TSOP 6 PGND EN/CTRL VDD GND 1 2 3 4 8 7 6 5 LED1 LED2 LED3 LED4 SM6804 MSOP-8 Page 1 V.1.0 July 12,2007 www.DataSheet4U.net www.DataSheet4U.net SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION TYPICAL APPLICATION EN/CTRL VDD VDD LED1 Enable and Logic Brightness Control Li-Ion Battery SM6804 LED2 LED3 LED4 GND GND ABSOLUTE MAXIMUM RATINGS Characteristic Input Voltage Output Voltage Voltage at all other pins Maximum Junction Temperature Storage Temperature Range Lead Temperature (soldering,10 seconds) Symbol VDD VLEDn TJ Rating -0.3 ~ 7.0 -0.3 ~ 7.0 -0.3 ~ 5.5 150 -40 ~ 150 260 Unit V V V o o o C C C 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) TA<25oC TA=70oC TA=85oC Power rating(mW) Power rating(mW) Power rating(mW) SOT-25 SOT-26 MSOP-8 220 220 180 4.5 4.5 5.56 568 568 695 363 363 444 295 295 361 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 www.DataSheet4U.net www.DataSheet4U.net SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION BLOCK DIAGRAM Current BIAS EN/CTRL Pulse Control Voltage Reference Driver 1 Output Step Control LED1 LED2 LED3 LED4 Driver 2 Driver 3 Driver 4 PIN DESCRIPTION (MSOP-8) Pin NO. 1 I/O - Pin Name PGND Power ground. Function Description 2 I EN/CTRL 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. Power supply Ground 3 4 - VDD GND 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 www.DataSheet4U.net www.DataSheet4U.net SAMHOP Microelectronics Corp. WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION RECOMMENDED OPERATING CONDITIONS Characteristic Supply Voltage Output Sink Current Operating free-air temperature range Symbol VDD ILED Ta Condition Min. 3 -40 Typ. Max. 5 25 +85 Unit V mA C DC ELECTRICAL CHARACTERISTICS (VDD = 3.7V, Ta = 25oC, No Load, unless otherwise noted) Apply Pin Characteristic "H" Level Input Voltage "L" Level "H" Level Input Current "L" Level Short Low Pulse Width Hold Time Between Pulse Long Low Pulse Width Minimum Disable Low Time LED Dropout Voltage Symbol VIH VIL IIH IIL ts tH tL td VLEDL Condition ILEDn=20mA ILEDn=20mA, Between IC Between LED1~LED4 (Note 1) Min. 2 -5.0 -5.0 9 10 125 480 - Typ. 100 20 400 0.1 Max. - Unit V 0.4 +5.0 µA +5.0 30 175 120 +/-5 +/-3 600 µs µs µs µs mV mA LEDn EN/CTRL LED Maximum Sink Current ILEDmax LED Sink Current Tolerance LED Sink Current Deviation Supply Current Standby Supply Current IDD IDDSTBY % % µA VDD .


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