1/4 Structure Silicon Monolithic Integrated Circuit Product Name RGB Illumination LED Driver for mobile phone Type BD2812GU Features RGB LED driver A slope control function is incorporated Slope control can be implemented using the DC current. Two modes “continuous illumination mode” and “illumination single cycle mode” are supported. Independent external ON/OFF synchronizing terminals (of dual drivers) are provided. Low consumption operation is possible by the sleep operation mode function. Charge pump system DC/DC built-in. ●Absolute Maximum Ratings (Ta=25 ℃) Parameter Symbol Limits Maximum Applied voltage VMAX Power Dissipation Pd Operating Temperature Range Topr -40 ~ +85 ℃ Storage Temperature Range Tstg -55 ~ +150 ℃ 7 1460 Unit V Note1） mW note1）Power dissipation deleting is-11.68mW/ ℃, when it’s used in over 25 ℃. (It’s deleting is on the board that is ROHM’s standard) Dissipation by LSI should not exceed tolerance level of Pd. ●Operating conditions（VBAT≥VIO, Ta=-40~85 ℃） Parameter Symbol Limits Unit VBAT input voltage VBAT 2.7 ~ 5.5 V VIO pin voltage VIO 1.65 ~ 3.3 V * Radiation-proof is not designed. REV. A 2/4 ●Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=1.8V) Parameter Symbol Min. Typ. Max. Unit Condition VBAT Circuit current 1 IBAT1 - 0.1 3.0 μA RESETB=0V, VIO =0V VBAT Circuit current 2 IBAT2 - 0.5 3.0 μA VBAT Circuit current 3 IBAT3 - 0.8 1.2 mA RESETB=0V, VIO=1.8V LED 6Ch ON, ILED=10mA setting Exclusive of LED current, RGBISET =120kΩ VBAT Circuit current 4 IBAT4 - 61 65 mA DC/DC x1mode, Io=60mA, VBAT=4.0V VBAT Circuit current 5 IBAT5 - 92 102 mA DC/DC x1.5mode, Io=60mA, VBAT=3.6V VBAT Circuit current 6 IBAT6 - 123 140 mA DC/DC x2mode, Io=60mA, VBAT=2.7V μA External clock Sleep operation mode External clock = 31.25kHz, ILED=0mA 【Circuit Current】 VBAT Circuit current 7 IBAT7 - 5 7.5 【LED Driver】 LED current Step 128 ILEDSTP step LED Maximum setup current IMAX - - 30.48 mA LED current accurate ILED 18 20 22 mA LED current Matching ILEDMT - 5 10 % LED OFF Leak current ILKL - - 1.0 μA VoCP1 - Vf+0.2 Vf+0.25 V 3.705 3.9 4.095 V RGB1 group, RGB2 group RGB1 group, RGB2 group RGBISET=100kΩ RGB1 group, RGB2 group, Terminal voltage =1V ILED=20mA setting, RGBISET =120kΩ RGB1 group, between RGB2 group, Terminal voltage =1V ILED=20mA setting 【DC/DC (Charge Pump)】 Output voltage 1 Output voltage 2 VoCP2 3.99 4.2 4.41 V 4.275 4.5 4.725 V 4.56 4.8 5.04 V Load stability Iout - - 255 mA Oscillator frequency fosc 0.8 1.0 1.2 MHz OVP - 6.0 6.5 V OCP - 250 375 mA -0.3 - 0.25 ×VIO V - VBAT+0.3 V - - V Over voltage protection detect voltage Over current protection detect current 【SDA, SCL】 At output voltage auto mode, Vf is forward direction voltage of LED At fixed voltage output mode, Io=60mA VBAT≥3.2V VBAT≥3.2V, VOUT=4V VOUT=0V 2 (I C interface ) L level input voltage VILI 0.75 × VIO 0.05 × VIO H level input voltage VIHI Hysteresis of Schmitt trigger input VhysI L level output voltage VOLI 0 - 0.3 V SDA pin, IOL=3 mA linI -10 - 10 μA Input voltage = 0.1×VIO~ 0.9×VIO Input current REV. A 3/4 ● Electrical Characteristics（(Unless otherwise specified, Ta=25℃, VBAT=3.6V, VIO=1.8V） Parameter 【RESETB】 Symbol Min. Typ. Max. Unit Condition -0.3 - 0.25 ×VIO V - VBAT+0.3 V - 10 μA - 0.25 ×VIO V - VBAT+0.3 V 3.6 10 μA Input voltage = 1.8V - 0.2 V IOL=1mA - - V IOH=1mA (CMOS input pin) L level input voltage VILR H level input voltage 0.75 × VIO -10 VIHR Input current IinR 【RGB1CNT, RGB2CNT】 L level input voltage VILCNT H level input voltage VIHCNT Input current IinCNT 【CLKIO（Output）】 Input voltage = 0.1×VIO~ 0.9×VIO (CMOS input pin with Pull-down resistance) -0.3 0.75 × VIO - (CMOS output pin) L level output voltage VOLCLK H level output voltage VOHCLK VIO -0.2 Output frequency1 fclk1 200 250 300 kHz FSEL=0 setting Output frequency2 fclk2 25 31.25 37.5 kHz FSEL=1 setting 【CLKIO (Input)】 L level input voltage H level input voltage Input current (CMOS input pin with Pull-down resistance) VILCLK -0.3 - 0.25 ×VIO V VIHCLK 0.75 × VIO - VIO+0.3 V IinCLK - 3.6 10 μA Input voltage = 1.8V ● Package Lot No. 3.1±0.05 1PIN MARK BD2812 1.0MAX 0.25±0.1 3.1±0.05 S 0.3±0.05 S 32-φ0.30±0.05 0.05 (φ0.15) INDEX POST A A B F E D C B A B 1 0.3±0.05 2 3 4 5 P=0.5×5 0.06 6 P=0.5×5 VCSP85H3 （unit:mm） REV. A 4/4 CPGND C2P C1P Charge Pump VBATCP VBAT2 VBAT1 C2N ●Pin Functions C1N ● Block Diagram x1 / x1.5 / x2 Charge Pump Mode Control LED port voltage Feedback RESETB Level I2C interface I/O Shift PIN PIN NAME VOUT VBATCP C5 C1P VOUTM F2 VBAT1 A5 C2N C2P C1 VBAT2 C6 A1 T1 D6 VOUT Slope Control G1LED A6 T2 D5 VOUTM (RGB1) B1LED F6 T3 E2 RGBISET R2LED F1 T4 E6 R1LED Slope Control G2LED A2 VIO E5 G1LED (RGB2) B2LED A3 RESETB F5 B1LED B3 SDA E4 R2LED B2 SCL E3 G2LED A4 CPGND F3 B2LED E1 GND1 D2 RGB1CNT B1 GND2 D1 RGB2CNT F4 RGBGND B4 ADDSEL B5 C1N C2 CLKIO SCL SDA PIN NAME B6 R1LED OVP VIO PIN Digital Control RGB1CNT RGBGND RGB2CNT CLKIO ADDSEL CLKIO RGBISET IREF VREF GND2 GND1 T4 T3 T1 T2 TSD ● Cautions on use (1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc. (2) Power supply and ground line Design PCB pattern to provide low impedance for the wiring between the power supply and the ground lines. Pay attention to the interference by common impedance of layout pattern when there are plural power supplies and ground lines. Especially, when there are ground pattern for small signal and ground pattern for large current included the external circuits, please separate each ground pattern. Furthermore, for all power supply pins to ICs, mount a capacitor between the power supply and the ground pin. At the same time, in order to use a capacitor, thoroughly check to be sure the characteristics of the capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant. (3) Ground voltage Make setting of the potential of the ground pin so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no pins are at a potential lower than the ground voltage including an actual electric transient. (4) Short circuit between pins and erroneous mounting In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between pins or between the pin and the power supply or the ground pin, the ICs can break down. (5) Operation in strong electromagnetic field Be noted that using ICs in the strong electromagnetic field can malfunction them. (6) Input pins In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input pin. Therefore, pay thorough attention not to handle the input pins, such as to apply to the input pins a voltage lower than the ground respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input pins when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input pins a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. (7) External capacitor In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc. (8) Thermal shutdown circuit (TSD) This LSI builds in a thermal shutdown (TSD) circuit. When junction temperatures become detection temperature or higher, the thermal shutdown circuit operates and turns a switch OFF. The thermal shutdown circuit, which is aimed at isolating the LSI from thermal runaway as much as possible, is not aimed at the protection or guarantee of the LSI. Therefore, do not continuously use the LSI with this circuit operating or use the LSI assuming its operation. (9) Thermal design Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (Pd) in actual states of use. (10) LDO Use each output of LDO by the independence. Don’t use under the condition that each output is short-circuited because it has the possibility that an operation becomes unstable. (11) About the pin for the test, the un-use pin Prevent a problem from being in the pin for the test and the un-use pin under the state of actual use. Please refer to a function manual and an application notebook. And, as for the pin that doesn't specially have an explanation, ask our company person in charge. (12) About the rush current For ICs with more than one power supply, it is possible that rush current may flow instantaneously due to the internal powering sequence and delays. Therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of wiring. (13) About the function description or application note or more. The function description and the application notebook are the design materials to design a set. So, the contents of the materials aren't always guaranteed. Please design application by having fully examination and evaluation include the external elements. REV. A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. 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