LB1941T-TLM-E

LB1941T-TLM-E ONSEMI | Alldatasheet

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60607 MS IM / N2502 AS (OT) No.7193-1/4 http://onsemi.com Semiconductor Components Industries, LLC, 2013 June, 2013 LB1941T Overview The LB1941T 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

• Constant current control (IO = 400mA when Rf = 0.5Ω)
• Ultraminiature package (MSOP8: 150mil)
• Built-in thermal protection circuit
• Includes a rapid charge/rapid discharge circuit for stable shutter operation.
• Built-in reference voltage circuit (0.2V typical) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage V CC max -0.3 to +10.5 V Output current I O max 600 mA Output applied voltage V O max -0.3 to V CC+0.3 V Input applied voltage V IN max IN1, IN2 -0.3 to +10.5 V Allowable power dissipation Pd max Mounted on a specified board.* 400 mW Operating temperature Topr -20 to +75 °C Storage temperature Tstg -55 to +150 °C Note*: Mounted on a board: 114.3mm×76.1mm×1.6mm, glass epoxy resin. Monolithic Linear IC For Digital Cameras Constant Current Forward/Reverse Driver IC Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Oper ating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.

No.7193-2/4 Allowable Operating Range at Ta = 25°C Parameter Symbol Conditions Ratings Unit Function-guaranteed voltage range VOPR 2.5 to 10 V Constant-current set range I OUT Set with RFG-GND resistance 50 to 500 mA Input low level voltage V IL IN1, IN2 -0.3 to +0.5 V Input high level voltage V IH IN1, IN2 2.0 to 10 V Electrical Characteristics at Ta = 25°C Ratings Parameter Symbol Conditions min typ max Unit Standby Current dissipation I STB V CC = 8.5V 1.0 μA Constant-current H bridge drive circuit VO(sat)1 V CC = 3V, IO = 200mA (Upper + Lower side) 0.20 0.35 V Output saturation voltage VO(sat)2 V CC = 4V, IO = 400mA (Upper + Lower side) 0.50 0.70 V Output constant current I OUT V CC = 4V, RL = 3Ω, RF = 0.5Ω 375 400 424 mA Temperature dependence of output constant current (reference Ta = 25°C) ΔIO V CC = 4V, RL = 3Ω, RF = 0.5Ω * (Ta = –10 to +60°C) -2 +2 % Operating current dissipation I CC V CC = 4V, RL = 0Ω, (No load, full drive) 14 21 mA Thermal protection operating temperature TSD Design target value * 150 180 210 °C Control input circuit IIH V IH = 5.5V, VCC = 5.5V 80 100 μA Control pin maximum input current IIL V IL = GND -1 0 μA Note*: These items are design target values and are not tested. Package Dimensions unit : mm (typ) 3245B SANYO : MSOP8(150mil) 3.0 1.1MAX 3.0 0.5 4.9 0.25 0.65(0.53) (0.85) 0.125 0.08 02 0--20 40 60 100 80 100 300 200 500 400 ILB01541 Pd max - Ta 192 Ambient temperature, Ta - °C Allowable power dissipation, Pd max - mW Specified board Mounted on a board: 114.3mm×76.1mm×1.6mm glass epoxy resin

No.7193-3/4 Pin Assignment Block Diagram 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. VCC OUT1 OUT2 0.2V IN2 GND FC RFG RL RF 0.01μF IN1 ILB01540 C P U Reference voltage Thermal protection circuit Boost charge circuit Boost discharge circuit Constant current control amplifier Logic circuit IN1 IN2 FC GND

8 VCC

7 OUT1

6 OUT2

5 RFG

No.7193-4/4 Truth Table Input Output IN1 IN2 OUT1 OUT2 Mode L L OFF OFF Standby 1* H L H L Forward rotation L H L H Reverse rotation H H OFF OFF Standby 2* Cautions for use Standby states 1 and 2 in the above truth table differ as follows: 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. PS Standby Standby Reverserotation ReverserotationFowardrotation IN1 IN2 ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s techn ical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC productsfor any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, anddistributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture oft h e part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.