ON CS387H Alternator voltage regulator darlington driver Datasheet

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 SO–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
SO–14
D SUFFIX
CASE 751A
14
1
CS33x1
AWLYWW
1
Features
Drives NPN Darlington
Short Circuit Protection
80 V Load Dump
Temperature Compensated Regulation Voltage
Shorted Field Protection Duty Cycle, Self Clearing
x
A
WL, L
YY, Y
WW, W
•
•
•
•
•
= 4 or 5
= Assembly Location
= Wafer Lot
= Year
= Work Week
PIN CONNECTIONS
SO–14
1
14
DD
GND
NC
OSC
Lamp
NC
NC
SC
NC
VCC
Sense
STATOR
NC
IGN
Flip Chip, Bump Side Up
DD
SC
GND
VCC
NC
Sense
OSC
Lamp
Stator
IGN
ORDERING INFORMATION
Device
Package
Shipping
CS3341YD14
SO–14
55 Units/Rail
CS3341YDR14
SO–14
2500 Tape & Reel
CS3351YD14
SO–14
55 Units/Rail
CS3351YDR14
SO–14
2500 Tape & Reel
Flip Chip
Contact Sales
CS387H
 Semiconductor Components Industries, LLC, 2002
August, 2002 – Rev. 11
1
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
MAXIMUM RATINGS*
Rating
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)
1. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.
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
µA
Supply
Driver Stage
Output High Current
VDD = 1.2 V
–10
–6.0
–4.0
mA
Output Low Voltage
IOL = 25 µA
–
–
0.35
V
Minimum ON Time
–
200
–
–
µs
Minimum Duty Cycle
–
–
6.0
10
%
Short Circuit Duty Cycle
–
1.0
–
5.0
%
Field Switch Turn On
Rise Time
–
30
–
90
µs
Field Switch Turn On
Fall Time
–
30
–
90
µs
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
µA
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 µA
–
–
0.5
V
Oscillator Frequency
COSC = 0.22 µF
65
–
325
Hz
Rise Time/Fall Time
COSC = 0.22 µF
–
17
–
–
Oscillator High Threshold
COSC = 0.22 µF
–
–
6.0
V
Oscillator
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3
CS3341, CS3351, CS387
ELECTRICAL CHARACTERISTICS (continued) (–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
–
–10
–
+10
µA
13.5
–
16
V
0.050
–
0.400
V
1.083
–
1.190
–
0.020
–
0.600
V
Battery Sense
Input Current
Regulation Voltage
@25°C, R1 = 100 kΩ, R2 = 50 kΩ
Proportional Control
–
High Voltage Threshold Ratio
VHigh Voltage @ LampOn
VRegulation @ 50%Duty Cycle
High Voltage Hysteresis
–
PACKAGE PIN DESCRIPTION
PACKAGE PIN #
SO–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 power up).
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 power up.
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
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4
CS3341, CS3351, CS387
APPLICATIONS INFORMATION
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.
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
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
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.
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
VBAT/N + VOSC
VREG
ÎÎ
ÎÎ
VBAT/N + VOSC
VREG
ÎÎÎ
ÎÎÎ
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 Ω
C1
0.1 µF
*C2
10 µF
R1
100 kΩ
C3
0.047 µF
VCC
Sense
R2
50 kΩ
C4
0.022 µF
MPSA13
or CS299
D1
MR2502
R4
18 kΩ
STATOR
SC
R5 10 kΩ
F
Driver
2N6284
Power
Darlington
OSC
IGN
R7
A
10 Ω
R6
20 kΩ
LAMP GND
POWER GROUND
FIELD
I
R9
2.4 kΩ
Lamp Indicator
R10
510 Ω
IGNITION
SWITCH
BATTERY
*Note: C2 optional for reduced jitter.
Figure 7. Typical Application DIagram
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CS3341, CS3351, CS387
488 µm
506 µm
510 µm
506 µm
605 µm
506 µm
2.07 mm
1000 µm
594 µm
762 µm
742 µm
1.96 mm
Figure 8. Flip Chip Dimensions and Solder Bump Locations, Bump Side Up
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CS3341, CS3351, CS387
PACKAGE DIMENSIONS
SO–14
D SUFFIX
CASE 751A–03
ISSUE F
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.
–A–
14
8
–B–
1
P 7 PL
0.25 (0.010)
7
G
M
B
M
–T–
SEATING
PLANE
D 14 PL
0.25 (0.010)
M
T B
J
M
K
S
A
DIM
A
B
C
D
F
G
J
K
M
P
R
F
R X 45 C
S
MILLIMETERS
MIN
MAX
8.55
8.75
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0
7
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.337
0.344
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0
7
0.228
0.244
0.010
0.019
PACKAGE THERMAL DATA
Parameter
SO–14
Unit
RΘJC
Typical
30
°C/W
RΘJA
Typical
125
°C/W
ON Semiconductor and
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8
CS3341/D
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