SANYO LB8684CL

Ordering number : EN0697
LB8684CL
Monolithic Digital IC
Digital Camera Motor Driver
for Cell Phones
Overview
The LB8684CL 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 LB8684CL 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 (ECSP2828-12)
Functions
• Constant current control (IOUT = 100mA at RF = 2Ω)
• Built-in thermal protection circuit
• Built-in reference voltage (0.2V typical)
• Built-in spark killer diode
• ENA input logic (3-port interface)
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Output voltage
Symbol
VOUT max
Input voltage
VIN max
Ground pin source current
Allowable power dissipation
Conditions
VCC max
IGND
Pd max
Ratings
Unit
-0.3 to +8.0
V
OUT1, OUT2, OUT3
VCC + VSF
V
ENA, CHSEL, IN
-0.3 to +8.0
Per channel
When mounted on a circuit board *
V
400
mA
450
mW
Operating temperature
Topr
-30 to +85
°C
Storage temperature
Tstg
-40 to +150
°C
* Specified circuit board : 20.0 × 10.0 × 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 B8-8900 No.0697-1/5
LB8684CL
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Supply voltage
VCC
High-level input voltage
VIH
Low-level input voltage
VIL
Conditions
Ratings
Unit
2.2 to 7.5
ENA, CHSEL, IN
V
1.5 to 7.5
V
-0.3 to 0.5
V
Electrical Characteristics at Ta = 25°C, VCC = 3.3V
Parameter
Symbol
Ratings
Conditions
min
Supply current
Output saturation voltage
Output constant current
Input current
ICCO
ENA = 0V
typ
Unit
max
0.1
1
μA
ICCO1
ENA = 3V, FC = 0V
3.8
5.5
mA
ICCO2
ENA = 3V, RF = 2Ω, excluding the output
current, IO
5.5
8.0
mA
VOUT1
ENA = 3V, IOUT = 100mA
0.2
0.3
V
VOUT2
ENA = 3V, IOUT = 200mA*
0.41
0.6
V
IOUT1
Between REF and GND : 2Ω
95
100
105
mA
IOUT2
Between REF and GND : 1Ω*
190
200
210
mA
50
70
μA
1
μA
IIN
VIN = 3V
Spark killer diode
Reverse current
IS(leak)
Forward voltage
VSF1
IOUT = 100mA
1.7
V
VSF2
IOUT = 200mA*
1.7
V
* Design guarantee: These characteristics are design targets and are not measured.
Package Dimensions
unit:mm (typ)
3324
SIDE VIEW
2.8
BOTTOM VIEW
(0.425)
TOP VIEW
2
0.65
2.8
2
0.35
1
1
0.4
0.8
0.015
0.8
(0.8)
SIDE VIEW
SANYO : ECSP2828-12
No.0697-2/5
LB8684CL
ENA
1
12
11
RSE
10
2
RFG
9
LB8684CL
IN
NC
3
8
4
5
6
OUT2
7
OUT3
500
Allowable power dissipation, Pd max – mW
CHSEL
OUT1
VCC
Pin Assignment
450
Pd max – Ta
Specified circuit board : 20.0×10.0×0.8mm3
paper-phenol board
400
300
234
200
100
0
– 30
0
30
60
85 90
GND
FC
Ambient temperature, Ta – °C
Top View
Block Diagram
Iris
Shutter
OUT1
OUT2
OUT3
VCC
1μF
Reference
voltage
ENA
CPU
CHSEL
0.2V
+
Constant current
control amplifier
Logic
block
IN
Thermal protection
circuit
GND
FC
RSE
RFG
0.001μF to 0.1μF
[Constant current formula] IOUT = 0.2 ÷ RF
RF
Example : If IO is 100mA, RF will be 2Ω.
Usage Notes : The set current is determined, as described by the above equation, by the resistor RF inserted between the
RFG pin and ground.
Truth Table
Input
ENA
CHSEL
Low
×
Low
High
High
Output
IN
OUT1
OUT2
Notes
OUT3
×
−
−
−
Low
High
Low
−
High
Low
High
−
Low
−
Low
High
High
−
High
Low
Standby
Forward
Shutter
Reverse
Forward
Aperture
Reverse
Note: "−" indicates the output off state. (high-impedance)
No.0697-3/5
LB8684CL
Timing Chart
ENA
Standby
Standby
Operate
CHSEL
OUT1/OUT2 drive
OUT2/OUT3 drive
IN
OUT1
OUT2
OUT3
•
•
•
•
•
The LB8684CL will be in standby mode when ENA is low and in normal operating mode when ENA is high.
CHSEL selects OUT1/OUT2 drive when low, and OUT2/OUT3 drive when high.
The IN pin is used for forward/reverse switching.
The broken line (----) indicates the off state.
During either OUT1/OUT2 or OUT2/OUT3 drive, the output high side transistor will be saturated and the low side
transistor will not be saturated. Note that the output current is a constant current.
No.0697-4/5
LB8684CL
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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 Co.,Ltd.
products described or contained herein.
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product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
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Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
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This catalog provides information as of March, 2007. Specifications and information herein are subject
to change without notice.
PS No.0697-5/5