CS3341 D

CS3341, CS3351, CS387
Alternator Voltage
Regulator Darlington Driver
The CS3341/3351/387 integral alternator regulator integrated circuit
provides the voltage regulation for automotive, 3−phase alternators.
It drives an external power Darlington for control of the alternator
field current. In the event of a charge fault, a lamp output pin is
provided to drive an external darlington transistor capable of
switching on a fault indicator lamp. An overvoltage or no STATOR
signal condition activates the lamp output.
The CS3341 and CS3351 are available in SOIC−14 packages. The
CS387 is available as a Flip Chip.
For FET driver applications use the CS3361. Use of the CS3341,
CS3351 or CS387 with external FETs may result in oscillations.
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MARKING
DIAGRAM
14
SOIC−14
D SUFFIX
CASE 751A
14
1
CS33x1G
AWLYWW
1
Features
•
•
•
•
•
•
Drives NPN Darlington
Short Circuit Protection
80 V Load Dump
Temperature Compensated Regulation Voltage
Shorted Field Protection Duty Cycle, Self Clearing
Pb−Free Packages are Available*
CS33x1
x
A
WL
Y
WW
G
MAXIMUM RATINGS
Rating
PIN CONNECTIONS
Value
Unit
Storage Temperature Range, TS
−55 to +165
°C
Junction Temperature Range
−40 to 150
°C
Continuous Supply
27
V
ICC Load Dump
400
mA
230 peak
°C
Lead Temperature Soldering:
Reflow: (SMD styles only) (Note 1)
= Specific Device Code
4 or 5
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.
1. 60 second maximum above 183°C.
1
SOIC−14
14
SC
NC
VCC
Sense
STATOR
NC
IGN
DD
GND
NC
OSC
Lamp
NC
NC
Flip Chip, Bump Side Up
DD
SC
GND
VCC
NC
Sense
OSC
Lamp
Stator
IGN
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
September, 2005 − Rev. 12
1
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
Publication Order Number:
CS3341/D
CS3341, CS3351, CS387
VCC
Load Dump
Detection and
Protection
ENABLE
Series
Regulator
IGN
VSUP
OSC
Sense
+
+
Regulator
Comparator
+
R
−
RS Flop
Set
Dominate
Q
VREG
OSC
Lamp
Indicator
S
Device Driver
R
High Voltage
Comparator
DELAY
+
−
SC
VHV
ENABLE
STATOR
Power Up
LAMP
STATOR
Timer
VSUP
GND
Figure 1. Block Diagram
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2
Note:
CS3341/CS387
Disconnected
CS3351 Connected
STATOR
CS3341, CS3351, CS387
ELECTRICAL CHARACTERISTICS (−40°C < TA < 125°C, −40°C < TJ < 150°C, 9.0 V ≤ VCC ≤ 17 V; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Unit
Supply Current Enabled
−
−
12
25
mA
Supply Current Disabled
−
−
−
50
mA
Supply
Driver Stage
Output High Current
VDD = 1.2 V
−10
−6.0
−4.0
mA
Output Low Voltage
IOL = 25 mA
−
−
0.35
V
Minimum ON Time
−
200
−
−
ms
Minimum Duty Cycle
−
−
6.0
10
%
Short Circuit Duty Cycle
−
1.0
−
5.0
%
Field Switch Turn On
Rise Time
−
30
−
90
ms
Field Switch Turn On
Fall Time
−
30
−
90
ms
Input High Voltage
−
10
−
−
V
Input Low Voltage
−
−
−
6.0
V
Stator
Stator Time Out
High to Low
6.0
100
600
ms
Stator Power−Up Input High
CS3351 only
10
−
−
V
Stator Power−Up Input Low
CS3351 only
−
−
6.0
V
Output High Current
VLAMP @ 3.0 V
−
−
50
mA
Output Low Voltage
ILAMP @ 30 mA
−
−
0.35
V
Lamp
Ignition
Input High Voltage
ICC > 1.0 mA
1.8
−
−
V
Input Low Voltage
ICC < 100 mA
−
−
0.5
V
Oscillator Frequency
COSC = 0.22 mF
65
−
325
Hz
Rise Time/Fall Time
COSC = 0.22 mF
−
17
−
−
Oscillator High Threshold
COSC = 0.22 mF
−
−
6.0
V
−10
−
+10
mA
13.5
−
16
V
0.050
−
0.400
V
1.083
−
1.190
−
0.020
−
0.600
V
Oscillator
Battery Sense
Input Current
Regulation Voltage
Proportional Control
High Voltage Threshold Ratio
High Voltage Hysteresis
−
@25°C, R1 = 100 kW, R2 = 50 kW
−
VHigh Voltage @ LampOn
VRegulation @ 50%Duty Cycle
−
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3
CS3341, CS3351, CS387
PACKAGE PIN DESCRIPTION
PACKAGE PIN #
SOIC−14
Flip Chip
PIN SYMBOL
1
1
Driver
Output driver for external power switch−Darlington
2
2
GND
Ground
3, 6, 7, 9, 13
3
NC
4
4
OSC
Timing capacitor for oscillator
5
5
Lamp
Base driver for lamp driver indicates no stator signal or overvoltage condition
8
6
IGN
10
7
Stator
Stator signal input for stator timer (CS3351 also powerup)
11
8
Sense
Battery sense voltage regulator comparator input and protection
12
9
VCC
Supply for IC
14
10
SC
Short circuit sensing
FUNCTION
No Connection
Switched ignition powerup
ORDERING INFORMATION
Package
Shipping †
CS3341YD14
SOIC−14
55 Units/Rail
CS3341YD14G
SOIC−14
(Pb−Free)
55 Units/Rail
CS3341YDR14
SOIC−14
2500 Tape & Reel
CS3341YDR14G
SOIC−14
(Pb−Free)
2500 Tape & Reel
CS3351YD14
SOIC−14
55 Units/Rail
CS3351YD14G
SOIC−14
(Pb−Free)
55 Units/Rail
CS3351YDR14
SOIC−14
2500 Tape & Reel
CS3351YDR14G
SOIC−14
(Pb−Free)
2500 Tape & Reel
CS387H
Flip Chip
Contact Sales
Device
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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4
CS3341, CS3351, CS387
TYPICAL PERFORMANCE CHARACTERISTICS
15.5
Battery Voltage
15
14.5
14
13.5
13
−40
−20
0
20
40
60
Temperature (°C)
80
100
120
Figure 2. Battery Voltage vs. Temperature (°C)
Over Process Variation
APPLICATIONS INFORMATION
The CS3341 and CS3351 IC’s are designed for use in an
alternator charging system. The circuit is also available in
flip−chip form as the CS387.
In a standard alternator design (Figure 3), the rotor carries
the field winding. An alternator rotor usually has several N
and S poles. The magnetic field for the rotor is produced by
forcing current through a field or rotor winding. The Stator
windings are formed into a number of coils spaced around
a cylindrical core. The number of coils equals the number of
pairs of N and S poles on the rotor. The alternating current
in the Stator windings is rectified by the diodes and applied
to the regulator. By controlling the amount of field current,
the magnetic field strength is controlled and hence the
output voltage of the alternator.
Referring to Figure 7, a typical application diagram, the
oscillator frequency is set by an external capacitor
connected between OSC and ground. The sawtooth
waveform ramps between 1.0 V and 3.0 V and provides the
timing for the system. For the circuit shown the oscillator
frequency is approximately 140 Hz. The alternator voltage
is sensed at Terminal A via the resistor divider network
R1/R2 on the Sense pin of the IC. The voltage at the sense
pin determines the duty cycle for the regulator. The voltage
is adjusted by potentiometer R2. A relatively low voltage on
the sense pin causes a long duty cycle that increases the Field
current. A high voltage results in a short duty cycle.
The ignition Terminal (I) switches power to the IC
through the VCC pin. In the CS3351 the Stator pin senses the
voltage from the stator. This will keep the device powered
while the voltage is high, and it also senses a stopped engine
condition and drives the Lamp pin high after the stator
timeout expires. The Lamp pin also goes high when an
overvoltage condition is detected on the sense pin. This
causes the darlington lamp drive transistor to switch on and
pull current through the lamp. If the system voltage
continues to increase, the field and lamp output turn off as
in an overvoltage or load dump condition.
The SC or Short Circuit pin monitors the field voltage. If
the drive output and the SC voltage are simultaneously high
for a predetermined period, a short circuit condition is
assumed and the output is disabled. The regulator is forced
to a minimum short circuit duty cycle.
A
Regulator
STATOR
Winding
S
Lamp
I Indicator
Ignition
Switch
FIELD
GND
FIELD
Winding
Figure 3. IAR System Block Diagram
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BATT
CS3341, CS3351, CS387
REGULATION WAVEFORMS
The CS3341/3351/387 utilizes proportion control to
maintain regulation. Waveforms depicting operation are
shown in Figures 4, 5 and 6, where VBAT/N is the divided
down voltage present on the Sense pin using R1 and R2
(Figure 7). A sawtooth waveform is generated internally.
The amplitude of this waveform is listed in the electric
parameter section as proportion control. The oscillator
voltage is summed with VBAT/N, and compared with the
internal voltage regulator (VREG) in the regulation
VBAT/N + VOSC
VREG
comparator which controls the field through the output
“Device Driver.”
Figure 4 shows typical steady−state operation. A 50%
duty cycle is maintained.
Figure 5 shows the effect of a drop in voltage on (VBAT/N
+ VOSC). Notice the duty cycle increase to the field drive.
Figure 6 shows the effect of an increase in voltage (above
the regulation voltage) on (VBAT/N + VOSC). Notice the
decrease in field drive.
VBAT/N + VOSC
VREG
ÎÎ
ÎÎ
VBAT/N + VOSC
VREG
ÎÎ
ÎÎ
Field Driver On
ÎÎ
ÎÎ
Field Driver On
Figure 4. 50% Duty Cycle,
Steady State
Field Driver On
Figure 5. > 50% Duty Cycle,
Increased Load
Figure 6. < 50% Duty Cycle,
Decreased Load
RECTIFIER
MR2502
STATOR
MR2502
S
R3
250 W
C1
0.1 mF
*C2
10 mF
R1
100 kW
C3
0.047 mF
VCC
Sense
R2
50 kW
C4
0.022 mF
MPSA13
or CS299
D1
MR2502
R4
18 kW
STATOR
SC
R5 10 kW
F
Driver
2N6284
Power
Darlington
OSC
IGN
R7
A
10 W
R6
20 kW
LAMP GND
POWER GROUND
FIELD
I
R9
2.4 kW
Lamp Indicator
R10
510 W
IGNITION
SWITCH
BATTERY
*Note: C2 optional for reduced jitter.
Figure 7. Typical Application DIagram
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6
CS3341, CS3351, CS387
488 mm
506 mm
510 mm
506 mm
605 mm
506 mm
2.07 mm
1000 mm
594 mm
762 mm
742 mm
1.96 mm
Figure 8. Flip Chip Dimensions and Solder Bump Locations, Bump Side Up
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7
CS3341, CS3351, CS387
PACKAGE DIMENSIONS
SOIC−14
D SUFFIX
CASE 751A−03
ISSUE G
−A−
14
NOTES:
1. DIMENSIONING AND
TOLERANCING PER ANSI Y14.5M,
1982.
2. CONTROLLING DIMENSION:
MILLIMETER.
3. DIMENSIONS A AND B DO NOT
INCLUDE MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION
0.15 (0.006) PER SIDE.
5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION.
ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127
(0.005) TOTAL IN EXCESS OF THE D
DIMENSION AT MAXIMUM
MATERIAL CONDITION.
8
−B− P7 PL
0.25 (0.010)M B
M
7
1
G
C
−T−
SEATING
PLANE
K
D14 PL
0.25 (0.010)M T B
F
RX 45_
S
A
MILLIMETERS INCHES
DIM MIN MAX MIN MAX
A 8.55 8.75 0.337 0.344
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.054 0.068
D 0.35 0.49 0.014 0.019
F 0.40 1.25 0.016 0.049
G
1.27 BSC 0.050 BSC
J 0.19 0.25 0.008 0.009
K 0.10 0.25 0.004 0.009
M
0_
7_
0_
7_
P 5.80 6.20 0.228 0.244
R 0.25 0.50 0.010 0.019
S
J
M
PACKAGE THERMAL DATA
Parameter
SOIC−14
Unit
RqJC
Typical
30
°C/W
RqJA
Typical
125
°C/W
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
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CS3341/D
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