Ordering number : ENA0610A Monolithic Linear IC LB1941GP For Digital Cameras Constant Current Forward/Reverse Driver Overview The LB1941GP is a single-channel forward/reverse driver IC that provides a constant current control function. Its low-saturation output makes it appropriate for voice coil motor control, and it is optimal for use as the shutter driver IC in digital cameras. Functions • High-performance dual operational amplifier • Constant current control (IO = 400 mA when Rf = 0.5Ω) • Built-in thermal protection circuit • Includes a rapid charge/rapid discharge circuit for stable shutter operation. • Built-in reference voltage circuit (0.2 V typical) • Ultraminiature package (VCT16 (2.6mm × 2.6mm) Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Conditions Ratings VCC max Unit -0.3 to +10.5 Output current IO max 600 Output applied voltage VO max -0.3 to VCC+0.3 Input applied voltage VIN max IN1, IN2 Allowable power dissipation Pd max Mounted on a specified board.* V mA V -0.3 to +10.5 V 0.7 W Operating temperature Topr -20 to +75 °C Storage temperature Tstg -55 to +150 °C Note*: Mounted on a board: 50×40×10.8 mm3: glass epoxy four-layer. Allowable Operating Range at Ta = 25°C Parameter Function-guaranteed voltage range Constant-current set range Symbol Conditions VOPR IOUT Set with RFG-GND resistance Ratings Unit 2.5 to 10 V 50 to 500 mA Input low level voltage VIL IN1, IN2 -0.3 to +0.5 V Input high level voltage VIH IN1, IN2 2.0 to 10 V ■ Any and all SANYO Semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. ■ SANYO Semiconductor assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor products described or contained herein. 33110 SY / 12407 MS PC 20060518-S00006 No.A0610-1/4 LB1941GP Electrical Characteristics at Ta = 25°C Parameter Symbol Standby Current dissipation ISTB Ratings Conditions min typ Unit max VCC = 10V 1.0 mV μA Constant-current H bridge drive circuit Output saturation voltage 1 VOUT11 VCC = 3V, IO = 200mA (Lower side) 0.08 0.15 VOUT12 VCC = 3V, IO = 200mA (Upper side) 0.12 0.23 V VOUT1 VCC = 3V, IO = 200mA (Upper + Lower side) 0.20 0.35 V VOUT21 VCC = 4V, IO = 500mA (Lower side) 0.25 0.38 V VOUT22 VCC = 4V, IO = 500mA (Upper side) 0.35 0.52 V VOUT2 VCC = 4V, IO = 500mA (Upper + Lower side) 0.60 0.90 V Output constant current 1 IOUT1 VCC = 4V, RL = 3Ω, RF = 1Ω 190 200 210 mA Output constant current 2 * IOUT2 VCC = 4V, RL = 3Ω, RF = 0.5Ω 375 400 424 mA Temperature dependence of ΔIO +2 % 14 21 mA 180 210 °C Output saturation voltage 2 * VCC = 4V, RL = 3Ω, RF = 0.5Ω * output constant current -2 (Ta = –10 to +60°C) (reference Ta = 25°C) Operating current dissipation ICC VCC = 4V, RL = 0Ω, (No load, full drive) Thermal protection operating TSD * IIH1 VIH = 5.5V, VCC = 5.5V 80 100 μA IIH2 VIH = 10V, VCC = 10V 145 200 μA 0 μA 150 temperature Control input circuit Control pin maximum input current IIL VIL = GND -1 Note*: Design guarantee: Characteristics shown here are design targets and measurement with independent unit is not made before shipment. Package Dimensions unit : mm (typ) 3318 Pd max -- Ta TOP VIEW SIDE VIEW BOTTOM VIEW (0.125) (0.13) 2.6 16 0.4 2.6 (C0.116) 2 1 0.5 LASER MARKED INDEX (0.55) Allowable power dissipation, Pd max -- W 1.0 0.8 Specified board: 50×40×0,8mm3 Fou-layer (2S2P), glass epoxy Specified board 0.7 0.6 0.2 0 --20 SIDE VIEW 0.42 0.4 0 20 40 60 80 100 MSG01470 0.25 (0.035) 0.8 Ambient temperature, Ta -- °C SANYO : VCT16(2.6X2.6) No.A0195-2/4 LB1941GP Pin Assignment (NC) OUT1 OUT2 (NC) 16 (NC) 1 VCC 2 15 13 14 12 RFG 11 RFS LB1941GP (NC) 3 10 GND (NC) 4 9 (NC) 5 6 7 8 (NC) IN1 IN2 FC Top view Block Diagram RL OUT1 OUT2 Reference voltage VCC C P IN2 -- Constant current control amplifier Boost charge circuit Boost discharge circuit GND Thermal protection circuit 0.01μF U Logic circuit IN1 + 0.2V FC RFS RFG RF ILB01540 No.A0195-3/4 LB1941GP Truth Table Input Mode Output IN1 IN2 OUT1 OUT2 L L OFF OFF H L H L Forward rotation L H L H Reverse rotation H H OFF OFF Standby 2* Standby 1* Cautions for use Standby states 1 and 2 in the above truth table differ as follows: Standby state 1 ............All circuits in IC are not operating and the current dissipation is almost zero. Standby state 2 ............The constant-current control amplifier output in IC is in the full drive condition. Both OUT1 and OUT2 are OFF. The current dissipation is a few mA. During mode transfer from the standby state 1 to forward (reverse) rotation, the current rises from the output current zero condition to the required constant current value. On the other hand, during mode transfer from the standby state 2 to forward (reverse) rotation, full drive is applied once to the output, then the current lowers to the required current value. Therefore, select the standby 1 state when putting IC in the standby state. A typical drive sequence is shown in the figure below. Reverserotation Fowardrotation Reverserotation Standby Standby IN1 IN2 Boost charge and discharge circuits In order to keep the output response time constant during mode transfer from the standby state to forward (reverse) rotation, this IC incorporates boost charge and discharge circuits for external capacitor connected to the FC pin. The external capacitor connected to the FC pin is for output phase compensation (to suppress oscillation), for which 0.01 to 0.1μF is recommended. Note that increase in the capacitor value results in increase in the time necessary for the constant current control to rise. Specifications of any and all SANYO Semiconductor products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. 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Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO Semiconductor believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of March, 2010. Specifications and information herein are subject to change without notice. PS No.A0195-4/4