Ordering number : ENA1625B
Bi-CMOS IC
For VCMs
LV8498CT
Overview
Constant-current Driver IC
The LV8498CT is a constant current driver IC for voice coil motors that supports I2C control integrating a digital/analog
converter (DAC). It uses an ultraminiature WLP package and includes a current detection resistor for constant current
control, which makes the IC ideal for miniaturization of camera modules intended for use in camera-equipped mobile
phones. The output transistor has a low on-resistance of 1Ω and the resistance of the built-in current detection resistor is
1Ω, which minimizes the voltage loss and helps withstand voltage drop in V . The function is incorporated, which, by
CC
changing the current in a stepped pattern while taking time at rise and fall of the output current, provides the current a slope,
improving the converging stability of the voice coil motor (current slope function).
Functions
• Constant current driver for voice coil motors.
• Constant current control enabled by DAC (10 bits).
• Wide operating voltage range (2.2 to 5.0V).
• I2C bus control supported.
• Built-in current detection resistor.
• 6-pin WLP package used (1.27 × 0.87 × 0.25mm).
• Built-in voltage drop protection circuit (V
= 2V output off). • Built-in thermal protection circuit.
CC
• Low output block total-resistance of 2Ω helps withstand voltage drop in V . (Current detection resistance + output
CC
transistor on-resistance).
• Built-in VCM overshoot preventive function (current slope function).
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Output voltage
Symbol
Conditions
Ratings
Unit
V
V
V
V
I
max
5.5
+ 0.5
5.5
CC
max
V
V
OUT
max
CC
Input voltage
SCL, SDA, ENA
V
IN
GND pin source current
Allowable power dissipation
Operating temperature
Storage temperature
200
mA
mW
°C
°C
GND
Pd max
Topr
With specified substrate *
350
-30 to +85
Tstg
-40 to +150
* Specified substrate : 40mm × 40mm × 1.6mm, Single layer glass epoxy substrate
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.
53011 SY/52511 SY/31710 SY 20091119-S00001 No.A1625-1/8
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