MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order Number: MC33099/D
Rev. 2, 06/2001
Advance Information
Alternator Voltage Regulator
The MC33099 is specifically designed for regulation of an automotive
system voltage using diode rectified alternator charging systems commonly
found in automotive applications. The MC33099 provides either an analog or
digital duty cycle control of an ON/OFF ratio of an alternator field current at a
fixed frequency. This provides for a Load Response Control (LRC) of the
alternator field current at low engine RPM to eliminate engine speed hunting
and vibration due to abrupt torque loading of the engine when a sudden
electrical load is applied to the system. Four LRC rates are selectable using
a combination of Pins 7 and 8 being connected to ground.
The MC33099 provides a regulated voltage feedback system to activate
the alternator field current in response to system load current. The system
voltage is monitored and level shifted using internal resistor voltage dividers,
to compared the level shifted system voltage to an internal voltage ramp
referenced to a bandgap reference voltage. The MC33099 regulates the
system voltage to 14.8 V by generating a Pulse Width Modulation (PWM)
voltage waveform at the gate of an external MOSFET to provide an average
alternator field coil current as a function of the internal voltage comparison.
MC33099
ALTERNATOR VOLTAGE
REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
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16
Provides High Side MOSFET Control of a Ground Referenced Field
Winding
Forced Load Response Control (LRC) at Low Engine RPM Due to
Abrupt System Load Currents
Four User Programmable LRC Rates From 1.8 Seconds to 7.4 Seconds
LRC Response During Initial Start
Regulation Voltage Range is
±0.1V
at a 14.8 V Regulation Voltage
@ 25°C
<0.1 V Variation Over Engine Speed Range From 2000 to 10,000 RPM
<0.2 V Variation Over 10% to 95% of Maximum Alternator Field Current
Minimum Duty Cycle of 3.1% for System Load Currents as Low as
1.0 A.
PWM Fixed Operating Frequency of 395 Hz
Internal Level Shifting of External System Voltages
Internal Lamp Driver with Short Circuit, Current Limit, Thermal Limit and
Load Dump Protection
Fault Protection for a Field Short to Ground
Load Dump Protection of Lamp Driver, Field Control Devices, and Loads
Fault Detection of Undervoltage, Overvoltage, Phase Loss (Lose or
Broken Belt) and High Remote Sense Resistance (lose or corroded
sense wire)
Controlled MOSFET and Field Flyback Diode Recovery Characteristics
for Minimum RFI
<1.5 mA Standby Current From Battery @ 25°C
<2.5 mA Standby Current From Battery @125°C
Gate
Battery
Gnd
Lamp Drain
Lamp Gate
Ignition
LRC2
LRC1
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16W)
PIN CONNECTIONS
1
2
3
4
5
6
7
8
(Top View)
16 Source
15 Phase
14 N.C.
13 Phase Filter
12 LRC Test
11 N.C.
10 Remote
9 AGnd
ORDERING INFORMATION
Device
PC33099DW
Operating
Temperature Range
T
A
= – 40°C to 125°C
Package
SO–16W
This document contains information on a new product. Specifications
and information herein are subject to change without notice.
MOTOROLA ANALOG
reserved.
©
MOTOROLA ANALOG IC DEVICE DATA
Motorola, Inc. 2001. All rights
IC DEVICE DATA
11
Simplified Block Diagram
2
Vrem
Remote
Vrs
CB1
VDD
Regulator
0.6 V
Local
Vl
LB
Vls
R1
R2
Phase
R3
S1
R4
R5
CB2
C
rs
RF
Vo
Low
Pass
FB
Vfb
Bandgap
Reference
Regulator
(OTC)
1.25 V
UV
Vref
(2.0 V)
VDD
(5.0 V)
Min Duty
Cycle
Generator
Cf
Local
Sense
C
uv
1.25 V
LD
S2
Vhvl
Over
Voltage
Detector
C
dc
Vdac
A
N
D
1
OR1
OV
Ign
Delay
Circuit
C
ign
1.25V
VTigm
Iign
C
ds
Lamp
Drain
Battery
VTdsc
Phase
Filter
C
ph
F1
1.25 V
F2
DAC
Battery
Charge
Pump
Regulator
Internal
V reg
and Bias
Current
Regulator
Vg
lpu
A
N
D
4
S3
Gate
Gate
Polling
Circuit
Css
Battery
VTssc
lpd
Z1
MC33099
Source
IGN
101 kHz
Osc
To
Logic
4 LSB
÷
16
4 MSB
Digital
Duty Cycle
Generator
1
2
Drain
Polling
Circuit
A
N
D
2
Lamp
Polling
Circuit
Lamp
Driver
Circuit
MOTOROLA ANALOG IC DEVICE DATA
Z2
10
11
8-Bit Counter
÷
256
u/d
MUX
U/D
Counter
A
N
D
3
OR2
Lamp
Gate
A/D Duty Cycle
Comparator
& Tracking
Circuit
u/d
Up/Down
Control
Switch
Thermal
Limit
Detector
Current
Limit
Detector
Dtl
Np
LCR Test
LCR1
LRC2
AGnd
Rs
Gnd
MC33099
MAXIMUM RATINGS
Rating
Power Supply Voltage
Load Dump Transient Voltage (Note 1)
Negative Voltage (Note 2)
Power Dissipation and Thermal Characteristics
Maximum Power Dissipation @ T
A
= 125°C
Thermal Resistance, Junction–to–Ambient
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
ESD Voltage
Human Body Model
Machine Model (Note 1)
V
ESD1
V
ESD2
2000
200
V
V
Symbol
V
bat
+V
max
–V
min
P
D
R
θJA
T
J
T
A
T
stg
Value
24
40
–2.5
640
85
150
–40 to 125
–45 to 150
Unit
V
V
V
mW
°C/W
°C
°C
°C
NOTE:
1. ESD2 voltage capability of phase filter pin is greater than 150V; All other device pins are as
indicated.
ELECTRICAL CHARACTERISTICS (T
A
= 25
°
C unless otherwise noted)
Characteristic
DC CHARACTERISTICS
Regulation Voltage @ 50% Duty Cycle (V
rem
= V
set
, or V
rem
<
V
Trem
)
Regulation Voltage Range (10% < DC < 95%)
Regulation Voltage Temperature Coefficient (TC) (V
rem
= V
bat
or V
rem
< V
Trem
)
Power Up/Down IGN Threshold Voltage
Operating Drain Current (Ignition ON) (V
ign
> V
Tign
, V
rem
=
V
ph
= V
set
)
T
A
= 25°C
–40°C < T
A
< 125°C
Standby Drain Current (Ignition OFF) (V
ign
< V
Tign
, V
ph
=
0 V, V
rem
= V
bat
= 12.6 V)
T
A
= 25°C
–40°C < T
A
< 125°C
Remote Loss Voltage Threshold
Phase Detection Threshold Voltage
Undervoltage Threshold Voltage
Overvoltage Threshold Voltage (1.125 V
set
)
Overvoltage Threshold Voltage TC = 1.125 (TC
Vset
)
Load Dump Threshold Voltage = 1.3 V
set
Load Dump Threshold Voltage TC = 1.3 (TC(V
set
))
Secondary Regulation = 1.25 V
set
(V
Trem
< V
rem
< (V
set
– 1.5
V)
Secondary Regulation TC = 1.25 (TC(V
set
))
Secondary Load Dump Threshold Voltage = 1.3 V
set2
Secondary Load Dump Threshold Voltage TC = 1.625
(TC(V
set
))
Lamp Drain Short Circuit Threshold Voltage
Lamp Drain Short Circuit Current
Lamp Drain ON Voltage (I
lamp
= 0.4 A)
Lamp Drain–to–Gate Clamping Voltage
Lamp Gate Override Resistance
V
set
dVset
TC(V
set
)
V
Tign
14.55
–
–13
0.9
14.8
210
–11
1.25
15.05
300
–9.0
1.6
V
mV
mV/°C
V
mA
I
Q1(on)
I
Q2(on)
–
–
6.5
6.5
8.0
8.4
mA
I
Q1(off)
I
Q2(off)
V
Trem
V
Tph
V
Tuv
V
Tov
TC(V
Tov
)
V
Tld
TC(V
Tld
)
V
set2
TC(V
set2
)
V
Tld2
TC(V
Tld2
)
V
Tdsc
I
dsc
V
d(sat)
V
dg
R
lg
–
–
4.2
3.75
10.9
16.15
–
18.9
–
18.0
–
23.5
–
1.8
2.0
–
–
–
0.6
1.0
4.5
4.0
11.35
16.65
–12.4
19.25
–14.3
18.5
–13.4
24
–17.9
2.25
2.5
0.3
48.48
4.6
1.5
3.2
4.8
4.25
11.6
17.15
–
19.8
–
18.8
–
25
–
2.85
3.0
2.5
55
–
V
V
V
V
mV/°C
V
mV/°C
V
mV/°C
V
mV/°C
V
Amps
V
V
kΩ
Symbol
Min
Typ
Max
Unit
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA ANALOG IC DEVICE DATA
33
MC33099
ELECTRICAL CHARACTERISTICS (T
A
= 25
°
C unless otherwise noted)
Characteristic
Lamp Driver Thermal Shutdown Temperature Limit
Gate Drive Source Current
Gate Drive Sink Current
Gate Drive Gate–to–Source Clamping Voltage
Minimum Charge Pump Gate Drive Voltage (V
bat
= V
source
=
V
set
)
Source Short Circuit Threshold Voltage
Remote Input Resistance (V
rem
= V
set
)
Phase Input Resistance (V
ph
= V
set
)
IGN Input Pull down Current (V
ign
= 1.25 V)
LRC Input Current (V
lrc
= 0 V)
AC AND SWITCHING CHARACTERISTICS
Duty Cycle Regulation Output Frequency (f
osc
/256)
Phase Rotation Detection Frequency
Low/High RPM Transition Phase Frequency
Gate Duty Cycle at Startup and WOT (f
ph
> f2)
Minimum Gate LRC Duty Cycle (f
ph
< f2)
Minimum Gate Duty Cycle (V
bat
> V
reg(max)
)
LRC Increasing Gate Duty Cycle Rate
Low RPM Mode (f
ph
< f2)
LRC1 at Gnd, LRC2 at Gnd
LRC1 Open, LRC2 at Gnd
LRC1 at Gnd, LRC2 Open
LRC1 Open, LRC2 Open
High RPM Mode (f
ph
> f2)
Ignition Turn OFF delay (Lamp ON)
Lamp Short Circuit ON Polling Frequency
Lamp Short Circuit ON Duty Cycle
Lamp OFF Polling Frequency
Lamp Polling OFF Duty Cycle
Field Short Circuit ON Polling Frequency
Field Short Circuit Polling ON Duty Cycle
NOTES:
1. 125 mS Wide Square Wave Pulse.
2. Maximum Time = 2 minutes
Symbol
T
Lim
I
pu
I
pd
V
gs
V
g(min)
V
Tssc
R
rem
R
ph
I
ign
I
lrc
Min
–
240
400
10
21.5
1.85
–
–
40
35
Typ
185
300
480
12
23.4
2.3
68
60
73
45
Max
–
340
.560
15
–
2.75
–
–
90
55
Unit
°C
µA
µA
V
V
V
kΩ
kΩ
µA
µA
f
dc
f1
f2
DC
start
DC
(LRC)min
DC
min
357
44.28
267.5
30
29
2.4
395
49
296
31.25
31.25
3.1
434
53.8
325
34.5
33.5
3.3
Hz
Hz
Hz
%
%
%
%/sec
R
lrc1
R
lrc2
R
lrc3
R
lrc4
R
lrc(max)
T
id(off)
f
lsc
DC
l
f
l(off)
DC
l(off)
f
fsc
DC
f
–
–
–
–
–
–
–
–
–
–
–
–
9.31
12.45
18.71
37.42
616
10.2
98.6
1.56
98.6
1.56
98.6
1.56
–
–
–
–
–
–
–
–
–
–
–
–
ms
Hz
%
Hz
%
Hz
%
4
MOTOROLA ANALOG IC DEVICE DATA
Figure 1. Simplified Application
Batt
VBat
Vrem
CB1
VDD
Regulator
Crs
Low
Pass
Cf
(OTC)
1.25 V
(5.0 V)
S3
Gate
Min Duty
Cycle
Gate
Polling
OR1
Css
Ign
Delay
Cign
1.25V
VTigm
Drain
Polling
Digital
Duty Cycle
Generator
MUX
U/D
Counter
A
N
D
3
fmsb
Iign
Cds
Z2
OR2
A
N
D
2
Lamp
Polling
Lamp
Driver
Circuit
Lamp
Drain
500
MR850
Lamp
Gate
Thermal
Limit
OV
VTssc
Cuv UV
1.25 V
LD
S2
Vhvl
F1
DAC
A
N
D
1
Vdac
F2
To
Logic
Cdc
Over
Voltage
Detect
Vref
(2.0 V)
VDD
l pu
S1
R4
CB2
R5
Vo
MTB36N06E
RF
Vfb
Bandgap
Reference
Vg
FB
Internal
Vreg
and Bias
Current
Remote
MC33099
Charge
Pump
Regulator
Vrs
Vl
0.6 V
Local
LB
Local
Sense
R1
R2
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA ANALOG IC DEVICE DATA
A
N
D
4
Batt
l pd
Source
Z1
Field
R3
IGN
Batt
VTdsc
Ignition
Vls
Phase
Phase
Filter
Cph
MC33099
CF
1.25 V
÷
16
4MSB
Osc
4 LSB
8-Bit Counter
÷
256
u/d
Np
LCR Test
LCR1
LRC2
fmsb
u/d
Up/Down
Control
Switch
Dtl
Current
Limit
Gnd
AGnd
Figure 1.
A/D
Comparator
& Tracking
Rs
Stator
Battery
Alternate Stator
Configuration
Boundry for IC
Ground
Remote
Phase
55
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