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Ordering number : EN7894B
LB8649W
Overview
Monolithic Digital IC
Digital Camera Motor Driver
The LB8649W integrates the actuator drivers required by digital cameras on a single chip.
Features
* Integrates the actuator drivers required by digital cameras on a single chip. 1. Shutter drive ("SH") /AE system constant current output stepping motor or two VCM drivers 2. Zoom system constant voltage output stepping motor or DC motor driver (forward/reverse/brake) 3. AF system constant voltage output stepping motor driver * Zero standby mode current consumption (allows batteries to be connected directly) * Four independent power supply systems (SH/AE, AF, zoom, and input logic systems) * Low-voltage drive (allows operation from two NiMH batteries) * Built-in thermal protection circuit
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Symbol VB max VCC max Maximum input voltage Maximum output voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature *1 Specified circuit board : 76.1 x 114.3 x VIN max VOUT max IO max Pd max Topr Tstg 1.6mm3, glass epoxy. Per channel When mounted on a circuit board *1 VB power supply VCC power supply Conditions Ratings 10.5 10.5 10.5 10.5 600 1.0 -20 to +80 -55 to +150 Unit V V V V mA W C C
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 B8-6247, B8-6569 No.7894-1/9
LB8649W
Allowable Operating Ranges at Ta = 25C
Parameter Supply voltage range Symbol VB1, 2, 3 VCC High-level input pin voltage Low-level input pin voltage Constant voltage setting input range Constant current setting input range *2 There are no restraints on the relative magnitudes of the VB1, VB2, VDD, VCC, and VIN power supply system voltages. Example 1 : VB1 = VB2 = VDD = 2.4V (battery power supply), VCC = 4V (stepped up power supply), VIN (CPU power supply) = 5V Example 2 : VB1 = VB2 = 2.4V, VIN = 3.3 V, VDD = VCC = 5V VOI IAE, ISH 0.1 to 1.0 V VINH VINL VOC VC1, VC2 *2 Conditions Ratings 1.9 to 10 1.9 to 10 1.8 to 10 -0.3 to 0.4 0.1 to VB V V V Unit V
Electrical Characteristics at Ta = 25C, VB = VCC = 2.4V, Rf = 1
Parameter Standby mode current consumption Operating mode current consumption ICC1 ICC2 ICC3 Reference voltage Vref1 Vref2 Control pin input current Thermal shutdown operating temperature AF System Constant Voltage Stepping Motor Driver (OUT1, 2, 3, 4) Output constant voltage 1 Output saturation voltage 1 VO1 VSAT1 VC1 = 0.30V IO = 0.2A (High and low side total) 1.46 0.27 1.53 0.37 1.60 0.50 V V IIN TSD IN1, IN2, IN3 or IN4 = High *3 IN5, IN6, IN7 or IN8 = High *3 IN9, IN10, IN11 or IN12 = High *3 Iref = -1mA, INHD = Low Iref = -1mA, INHD = High VIN = 5.0V Design guarantee *4 160 0.95 0.64 Symbol ICC0 Conditions min VB1 = VB2 = VCC = VDD = 8.0V *3 Ratings typ 0.1 6 14 18 1.0 0.67 60 180 max 5.0 9 19 25 1.05 0.70 90 200 A C V A mA Unit
Zoom System Constant Voltage Driver (OUT5, 6, 7, 8) Output constant voltage 2 Output saturation voltage 2 VO2 VSAT2 VC2 = 0.30V IO = 0.2A (High and low side total) 1.46 0.27 1.53 0.37 1.60 0.50 V V
SH/AE System Constant Current Driver (OUT9, 10, 11, 12) Output constant current Output saturation voltage 3 IO VSAT3 Rf = 1, ISH = 0.3V IO = 0.3A (High and low side total) 271 0.33 285 0.44 302 0.60 mA V
*3 : This is stipulated to be the sum of the current consumption for the VB1, VB2, VDD, and VCC lines. *4 : The device characteristics are not tested at all temperatures. They are only tested at Ta = 25C at shipment; the characteristics in the guaranteed temperature range are design guarantees.
No.7894-2/9
LB8649W
Package Dimensions
unit : mm (typ) 3163B
1.2
Pd max - Ta
Specified circuit board : 76.1x114.3x1.6mm3 glass epoxy board
36 37
25 24
0.5
9.0 7.0
Allowable power dissipation, Pd max - W
1.0
0.8
0.6
7.0 9.0
0.56
0.4
48 1 0.5 (0.75) 12 0.18
13
0.2
0.15
0 - 20
0
20
40
60
80
100
Ambient temperature, Ta - C
1.7max (1.5) 0.1
SANYO : SQFP48(7X7)
Pin Assignment
PGND 38 VREF VCC VC2 VC1 VB1 ISH OUT1 37 36 OUT2 35 OUT3 34 OUT4 33 OUT9 32 RFG1 31 OUT10 30 OUT11 29 RFG2 28 OUT12 27 OUT5 26 OUT6 25 OUT7 13 INHD 14 SGND 15 (NC) 16 VDD 17 FC2 18 FC1 19 (NC) 20 VCC 21 VB2 22 (NC) 23 PGND 24 OUT8 Top view
ILB0159
(NC)
(NC)
48 IN1 1 IN2 2 IN3 3 IN4 4 IN5 5 IN6 6 IN7 7 IN8 8 IN9 9 IN10 10 IN11 11 IN12 12
47
46
IAE
45
44
43
42
41
40
39
LB8649W
Note : Both PGNDs must be connected. VDD : Power supply for the input system, reference voltage, and logic blocks. VCC : Power supply for the constant current control block and output blocks (OUT9, 10, 11, and 12) VB1 : Power supply for the constant voltage control block and output blocks (OUT1, 2, 3, and 4) VB2 : Power supply for the constant voltage control block and output blocks (OUT5, 6, 7, and 8)
(NC)
No.7894-3/9
LB8649W
Truth Table
(1) AF system stepping motor constant voltage control
Input IN1 Low High High Low Low Low Low Low High High * * IN2 Low Low Low Low High High High Low Low High * * IN3 Low Low High High High Low Low Low Low * High * IN4 Low Low Low Low Low Low High High High * High * Low High Low INHD Low OUT1 - High High - Low Low Low High - OUT2 - Low Low - High High High Low - - - 1.0V 0.67V Output OUT3 - - High High High - Low Low Low OUT4 - - Low Low Low - High High High Output off 1.0V 1-2 phase excitation Vref - Standby Mode
Notes 1. 2. "-" indicates the output off state. When the output is high, a level that is VC1 x 5.1 will be output.
(2) Zoom stepping motor constant voltage control, or DC motor drive
Input IN5 Low High High Low Low Low Low Low High High * * IN6 Low Low Low Low High High High Low Low High * * IN7 Low Low High High High Low Low Low Low * High * IN8 Low Low Low Low Low Low High High High * High * Low High Low INHD Low OUT5 - High High - Low Low Low High High OUT6 - Low Low - High High High Low High High High 1.0V 0.67V Output OUT7 - - High High High - Low Low Low OUT8 - - Low Low Low - High High High Brake 1.0V 1-2 phase excitation Vref - Standby Mode
Notes 1. 2. "-" indicates the output off state, "*" indicates "Don't care". When the output is high, a level that is VC2 x 5.1 will be output.
No.7894-4/9
LB8649W
(3) SH/AE system VCM driver constant current control or stepping motor drive
Input IN9 Low High Low * * High Low * * Low IN10 Low Low High * * Low High * * Low IN11 Low * * High Low * * High Low Low IN12 Low * * Low High * * Low High Low - - High High Low Low High High Low - Low High - Discharged Standby 0.67V Low INHD OUT9 - High Low OUT10 - Low High High Low Low High Setting voltage state Hold 1.0V SH & AE OUT11 - Output OUT12 - Vref - ISH - Standby Mode
Notes 1. "-" indicates the output off state, "*" indicates "Don't care". 2. OUT9 and OUT10 are for SH, and provide stable startup characteristics with fast charge and fast discharge circuits. 3. OUT10 and OUT11 are for AE. 4. In standby mode, the ISH pin voltage is discharged by an internal transistor and thus is set to 0V. 5. Furthermore, the ISH pin is also set to the discharged state when inputs are provided to IN1 through IN8. This is for startup correction. 6. When INHD is low, the Vref voltage will be 1.0V, and when high, the Vref voltage will be 0.67V.
Notes on Application Design
(1) Constant current level setting (ISH, IAE, RFG1/2, and OUT9 to OUT12) The constant current level for the OUT9/10 pair is set by the ISH input voltage and the resistor connected to RFG1. As shown in the block diagram, the current is controlled so that the voltage generated across the current detection resistor connected between RFG1 and ground and the ISH input voltage become equal. The output current can be determined from the following equation. (Output current between OUT9 and OUT10) = (ISH input voltage) / (RFG1 resistance + 0.05) The 0.05 here is the shared impedance of the emitter of the output transistor that drives the constant current and the constant current control amplifier's sensing line. Similarly, the constant current level for the OUT11/12 pair is set by the IAE input voltage and the resistor connected to RFG2. Note that since the constant current control block is connected to PGND internally to the IC, if voltage is provided to ISH and IAE through a voltage divider, the voltage divider resistor ground must be connected to PGND. (2) Rapid charge and discharge circuits (FC1, OUT9, and OUT10) The SH control block (OUT9/10) includes rapid charge and rapid discharge circuits to support burst (rapid sequential) imaging. Since this type of circuit is not included in the AE control block (OUT11/12), the OUT9/10 block must be used for shutter drive.
No.7894-5/9
LB8649W
(3) Startup correction function (ISH, OUT9, and OUT10)
Startup correction coil current
When VCC is high (no ISH capacitor) When VCC is low (no ISH capacitor)
Coil current
Startup correction coil current
ISH discharge
SH close operation
Startup correction is applied to the coil waveform by setting the ISH pin input voltage to a time constant larger than that of the coil with an external RC circuit. This makes it possible to provide stable shutter operation even in the presence of power supply fluctuations. Note : For the ISH startup correction, the capacitance is determined by, in the state where the ISH capacitor is not present, verifying the coil current startup waveform when VCC is at a reduced level and choosing a capacitance such that the time constant is lower than that of this waveform. Note, however, that in cases where, for example, the supply voltage is stabilized and a startup correction function is not needed, this startup correction capacitor is not needed. (4) Phase correction capacitor (FC1, FC2) Consider values in the range 0.0015 to 0.033F for the FC1/2 capacitors, and select values such that oscillation in the output is not a problem. If a coil with a particularly high impedance is used, an adequate margin must be provided in the capacitor value. Note that since the constant current control block is connected to PGND internally to the IC, the ground sides of the FC1/2 capacitors must be connected to PGND. Notes to determine the value of FC1 and FC2 capacitors FC1 is the connection for the phase compensation capacitor for the OUT9/10 output constant current control circuit. Similarly, FC2 is the connection for the OUT11/12 phase compensation capacitor. To determine the value of these capacitors, observe the output waveform and select a value such that the output does not oscillate. The FC pin is connected in the IC circuit to the constant current control amplifier output blocs and the output transistor is driven by the rise in the FC potential. Therefore, since the FC pin initial state influences the output drive timing, before applying power to the shutter, this IC discharges (with the rapid discharge circuit) the FC pin to a certain fixed potential internally and then when starting to apply power to the shutter, the IC charges (with the rapid charge circuit) the FC pin to a fixed potential internally so that the FC pin state is always fixed when driving the shutter. This stabilizes the input to output delay time. However, if the capacitor value is made too large, the time required for the above circuit to charge and discharge that capacitor will become longer and the input to output delay time fluctuations will become larger due to variations in the capacitor value (due both to sample-to-sample variations and to temperature characteristics). Another disadvantage of making this capacitor larger is that the coil current rising slope will become less steep. Although the rising slope of the coil current is essentially determined by the inductance component of the coil, if the capacitor is made larger and its time constant increases, the slope of the rise of the coil current will become dependent on the capacitor value. For the above reasons, especially if high-speed shutter drive is required, the value of the capacitor connected to the FC pin should as small as possible as long as the output does not oscillate (the range roughly from 0.0015 to 0.033 F).
No.7894-6/9
LB8649W
(5) Constant voltage control: oscillation stopping capacitors (OUT1 to OUT8) If constant voltage control is used, capacitors must be connected across the outputs to stop oscillation. Consider values in the range 0.01 to 0.1F and select capacitor values such that oscillation in the output is not a problem. Note that if the output is driven at saturation, these oscillator prevention capacitors are not required. (6) Ground and power supply line capacitors (PGND, SGND, VCC, VB1, VB2, VDD) Capacitors must be inserted between PGND (two locations) and SGND and each of the power supply pins. These capacitors must be positioned as close as possible to the IC. (7) Input pin equivalent circuits
IN1 to IN12, INHD pins VC1, VC2 pins
Logic
1A or less
IN pins 80k VC pins
IAE pin
ISH pin
1A or less
IAE pin
1A or less
ISH pin
Startup correction control circuit
No.7894-7/9
Block Diagram
Oscillation stopping capacitor 0.01 to 0.1F 0.01 to 0.1F 0.01 to 0.1F 0.01 to 0.1F
Constant voltage output
Braking function included
Constant current startup setting capacitor
LB8649W
Logic block Reference voltage thermal protection circuit Rapid charge/ discharge circuit
Constant current output
Internal impedance 0.0015 to 0.033F Phase correction capacitor 0.0015 to 0.033F
No.7894-8/9
LB8649W
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This catalog provides information as of March, 2007. Specifications and information herein are subject to change without notice. PS No.7894-9/9

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