Product is End of Life 12/2014
SiP42104
Vishay Siliconix
H-Bridge Driver and Pulse Width Controller
for Digital Camera Micro Modules
DESCRIPTION
The SiP42104 is a 250 mA integrated H-bridge driver and
programmable output-pulse-width controller. It offers a
complete and cost-effective solution for micro camera focus
module applications such as shutter, iris, lens cover and
Infrared filter drivers. The output voltage direction of the
H-bridge is set by the presence of the rising or falling edge
at the digital interface pin IN and the corresponding
on-duration is set by the RC pin time constant. During
time-out, the input deglitcher-latch is transparent to
input noise durations of less than 300 ns. Internal
breakbefore-make prevents output shoot-through. When the
H-bridge turns off after time-out, the lower N-channel
MOSFETs are turned on for a short interval to prevent
turning on their body diodes. The low IN threshold logic and
the sub micro-amp steady state quiescent current is ideal for
low battery applications.
The SiP42104 is offered in the ultra-small lead (Pb)-free
SC-89 package (SOT666) and it is rated over the industrial
ambient range of - 40 °C to + 85 °C.
FEATURES
•
•
•
•
•
•
•
•
Low supply range: 2.3 to 4.2 V
Low R
H
: 0.85
Ω
at 2.8 V and 150 mA
Output current up to 250 mA
RoHS
COMPLIANT
Output voltage direction depends on input
Rising or falling edges
Break before make cross-over protection
300 ns de-glitch circuit
Programmable RC timer to set output pulse width
Sub micro-amp quiescent current
SC89-6L package (1.6 x 1.6 x 0.6 mm)
•
APPLICATIONS
•
•
•
•
Digital camera
Cell phones
Small DC motor control
Dual-stage latchable relay driver
TYPICAL APPLICATION CIRCUIT
V
DD
INPUT
BUFFER
AND
DEGLITCHER
IN
SW2
OUT2
1.75 µA
SW1
RC
TIMER
AND
PULSE WIDTH
CONTROLLER
H-BRIDGE
DRIVER
AND
BBM
M1
M3
L
LOAD
M2
M4
R
LOAD
R
C
OUT1
GND
Figure 1.
Document Number: 74633
S-80224-Rev. C, 04-Feb-08
www.vishay.com
1
SiP42104
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Input Voltage (V
DD
)
Input Voltage (V
IN
)
Output DC Voltage (V
OUT1
, V
OUT2
)
Maximum Pulsed Current (I
OUT1
, I
OUT1
)
ESD Rating (HBM)
Thermal Resistance
a
(θ
JA
)
Power Dissipation
b
(P
D
)
Maximum Junction Temperature (T
JM
)
Lead Temperature
c
(T
L
)
Storage Temperature (T
S
)
Notes:
a. Soldered down to PCB 1 inch
2
1 oz copper.
b. Derate - 2.15 mW/°C above 70 °C.
c. Soldering 5 s.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to absolute maximum rating/conditions for extended periods may affect device reliability.
Limit
- 0.3 to 4.5
- 0.3 to 4.5
- 0.3 to 4.5
250
5.5
465
172
150
260
- 65 to 150
°C
mA
kV
°C/W
mW
V
Unit
RECOMMENDED OPERATING RANGE
Parameter
V
DD
I
OUT
Timing Resistor
Timing Capacitor
Output Inductive Load L
DCR Of Output Inductive Load
Limit
2.3 to 4.2
± 150
10 K to 500 K
10 to 220
10 to 550
15 to 30
Unit
V
mA
Ω
nF
µH
Ω
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Document Number: 74633
S-80224-Rev. C, 04-Feb-08
SiP42104
Vishay Siliconix
TIMING DIAGRAM
T
EDGE
< 100 ns
T > 2
µs
T
EDGE
< 100 ns
SS
Input Control Logic
Input Control Logic
Output Current
V
OUT1
V
OUT2
T
RC
= 1.3 x RC
T
RC
= 1.3 x RC
Figure 4.
DETAILED OPERATIONAL DESCRIPTION
SiP42104 is an easy to use integrated H-bridge driver and
programmable output pulse width controller IC intended for
digital camera micro module focus mode applications. The
IC is designed to drive a solenoid of several hundred
micro-Henrys and operates over the supply range of 2.3 to
4.2 V. Both H-bridge output can source and sink up to
250 mA. The break-before-make delays prevents
shoot-through via M1 to M2 or M3 to M4 in the H-bridge and
is guaranteed by design.
In the absence of any edge transitions at the input pin, the IC
is in the power-down mode with the H-bridge outputs at high
impedance drawing only sub micro-amp of leakage current
from the supply.
The input pin is CMOS logic level and has typical 1.75 µA
pull-down current, the input pin is buffered by a Schmitt
trigger with the threshold level of 1.1 V and typical hysteresis
of 280 mV. A logic transition closes SW2 and initiates the
H-Bridge output turn-on for duration set by the external RC
time constant. The logic level transition is latched in the
device and this logic level transition determines which of the
H-Bridge output MOSFETs turns on. If the logic transition is
rising from ground to V
DD
, with the high condition being
present for at least 2 µs, then M1 and M4 will turn on, M2 and
M3 will turn off. This means that OUT1 will go high and OUT2
will go low. Conversely, a falling logic transition is from V
DD
to ground, with the low level being present for 2 µs, will turn
on M2 and M3, M1 and M4 will turn off. Once the input
transition is latched, SiP42104 will ignore any input spurious
transition until the RC pin time out is completed. An internal
deglitch filter following the input buffer prevents SiP42104
from being accidentally triggered by the input pulse less than
300 ns duration.
Document Number: 74633
S-80224-Rev. C, 04-Feb-08
A positive edge transition on the input pin also initiates
SiP42104 to charge the RC pin to V
DD
via SW1. This
pre-charge period lasts for approximately 30 µs. When the
pre-charge period is completed, SW1 will turn off and the
external capacitor begins to discharge via the external
resistor. The timer and pulse width controller sense the
voltage on RC pin. When the voltage on the RC pin falls to
V1 (0.27 x V
DD
). The timer and pulse width controller
terminate the timeout and turn off the relevant H-bridge
outputs. This yields and output pulse width given by:
T
OUTPUT
= 1.3 x RC
SiP42104 H-bridge output typically drives an inductive load.
When output are turned off after the RC timeout, the current
will still be flowing in the inductive load. To prevent the load
current from forward biasing the body diodes of the output
MOSFETs, both H-bridge low-side MOSFETs M2 and M4
will turn on briefly to allow the inductive load current to
discharge to zero. When the voltage on the RC pin has fallen
to V2 (0.23 x V
DD
). This yields a discharge time:
T
DISCHARGE
= 0.13 x C x R1
Where R1 is the built-in resistor of 1.1 kΩ.
Following this discharge time period, SW2 and all H-bridge
output MOSFETs are turned off. SiP42104 powers down to
its low quiescent current state. SiP42104 will remain in this
state until the next input transition logic applied to the input
pin to wake up.
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