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Ordering number : EN0696
Monolithic Digital IC
LB8681CL
Overview
Constant Current Driver IC with H-bridge x 1.5 Channel
The LB8681CL is a low-voltage, low-saturation 1.5-channel constant current forward/reverse driver IC provided in a miniature package suitable for use in cell phone cameras. The LB8681CL can be driven directly from a microcontroller and is optimal for control of the voice coil motors used for shutter and aperture control in cell phone cameras.
Features
* Supports low-voltage drive. (2.2V or more) * Ultraminiature package (ECSP2828-10)
Functions
* Constant current control (IOUT = 100mA at RF = 2) * Built-in thermal protection circuit * Built-in reference voltage (0.2V typical) * Built-in spark killer diode
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Output voltage Input voltage Ground pin source current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VOUT max VIN max IGND Pd max Topr Tstg OUT1, OUT2, OUT3 IN1, IN2, IN3 Per channel When mounted on a circuit board * Conditions Ratings -0.3 to +8.0 VCC + VSF -0.3 to +8.0 400 450 -30 to +85 -40 to +150 Unit V V V mA mW C C
* Specified circuit board : 20.0 x 10.0 x 0.8mm3, paper-phenol
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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.
31407 TI PC B8-8350 No.0696-1/5
LB8681CL
Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage High-level input voltage Low-level input voltage Symbol VCC VIH VIL IN1,IN2,IN3 Conditions Ratings 2.2 to 7.5 1.8 to 7.5 -0.3 to 0.7 Unit V V V
Electrical Characteristics at Ta = 25C, VCC = 3.3V
Parameter Supply current Symbol ICC0 ICC1 Output saturation voltage VOUT1 VOUT2 Output constant current IOUT1 IOUT2 Input current Spark killer diode Reverse current Forward voltage IS(leak) VSF IOUT = 200mA* 1 1.7 A V IIN Conditions min IN1 = IN2 = IN3 = 0V IN1, IN2, or IN3 = 3V IN1, IN2, or IN3 = 3V, IOUT = 100mA IN1, IN2, or IN3 = 3V, IOUT = 200mA* Between REF and GND : 2 Between REF and GND : 1* VIN = 3V 95 190 Ratings typ 0.1 13.9 0.20 0.41 100 200 40 max 1 18 0.32 0.62 105 210 60 A mA V V mA mA A Unit
* Design guarantee: These characteristics are design targets and are not measured.
Package Dimensions
unit : mm (typ) 3301A
TOP VIEW 2.8 1 2 10 SIDE VIEW BOTTOM VIEW
1
0.3
2.8
6 0.075 SIDE VIEW
5
(0.8)
(0.015)
0.8
SANYO : ECSP2828-10
0.05
0.6
(0.2)
0.325
No.0696-2/5
LB8681CL
Pd max - Ta
Specified circuit board : 20.0x10.0x0.8mm3 paper-phenol board
Allowable power dissipation, Pd max - mW
500 450 400
300
234 200
100
0 - 30
0
30
60
85 90
Ambient temperature, Ta - C
Pin Assignment
VCC
1
10
OUT1
IN1
2
9
RSE
IN2
3
LB8681CL
8
RFG
IN3
4
7
OUT2
GND
5
6
OUT3
Top View
No.0696-3/5
LB8681CL
Block Diagram
Shutter OUT1 VCC 0.1F IN1 0.2V + Reference voltage
Constant current control amplifier
0.1F OUT2 Iris OUT3
IN2 CPU
Logic circuit
IN3
Thermal protection circuit GND RSE RFG
[Constant current formula] IOUT = 0.2 / RF When VCC is high, the 0.01F capacitor may be inserted between OUT and OUT.
Truth Table
Input IN1 IN2 Low High Low Low High Low High High Low High IN3 Low Low High High Low Low High High OUT1 - High Low Low - - - - Output OUT2 - Low High High - Low High High OUT3 - - - - - High Low Low Aperture Off Forward Reverse Shutter Notes Standby Forward Reverse
Note : "-" indicates the output off state. (high-impedance)
No.0696-4/5
LB8681CL
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This catalog provides information as of March, 2007. Specifications and information herein are subject to change without notice. PS No.0696-5/5

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