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Freescale Semiconductor Electronic Components Datasheet

33099 Datasheet

Adaptive Alternator Voltage Regulator

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33099 pdf
www.DFarteaeSshceeatl4eUS.ceommiconductor
Technical Data
Adaptive Alternator Voltage
Regulator
The 33099 is designed to regulate the output voltage in diode-
rectified alternator charging systems common to automotive
applications. The 33099 provides either an analog or digital fixed
frequency duty cycle (ON/OFF ratio) control of an alternator’s field
current. Load Response Control (LRC) of the alternator field current
is accomplished by selecting the duty cycle for prevailing engine
conditions to eliminate engine speed hunting and vibrations caused
by abrupt torque loading of the engine owing to sudden electrical
loads being applied to the system at low engine RPM. Four LRC rates
are selectable by connecting pins 7 and 8 to ground.
The 33099 uses a feedback voltage to establish an alternator field
current that is in harmony with system load currents. The output
voltage is monitored by an internal voltage divider scheme and
compared to an internal voltage ramp referenced to a bandgap
voltage. This approach provides precision output voltage control over
a wide range of temperature, electrical loads, and engine RPM.
Features
• External High-Side MOSFET Control of a Ground-Referenced
Field Winding
• LRC Active During Initial Start
• Vset at ±0.1 V @ 25°C
• <0.1 V Variation Over Engine Speeds of 2,000 to 10,000 RPM
• <0.2 V Variation Over 10% to 95% of Maximum Field Current
• Controlled MOSFET and Field Flyback Diode Recovery
Characteristics for Minimum RFI
• Trimmed Devices Available at 14.6 V and 14.8 V (typical) Vset
• Pb-Free Packaging Designated by Suffix Code EG
Document Number: MC33099
Rev. 6.0, 1/2007
33099
VOLTAGE REGULATOR
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42567B
16-PIN SOICW
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC33099DW/R2
MC33099CDW/R2
MCZ33099EG/R2
MCZ33099CEG/R2
-40°C to 125°C
16 SOICW
16 SOICW
(Pb-FREE)
33099
PHASE
GATE
SOURCE
PHASE FILTER
FIELD
WINDING
IGN
LAMP DRAIN
BAT
REMOTE
LRC1
LRC2
AGND
GND
IGNITION
SWITCH
CHASSIS
Figure 1. 33099 Simplified Application Diagram
© Freescale Semiconductor, Inc., 2007. All rights reserved.


Freescale Semiconductor Electronic Components Datasheet

33099 Datasheet

Adaptive Alternator Voltage Regulator

No Preview Available !

33099 pdf
PHASE
FILTER
BATT
Vbat
REMOTE
Vrem
Vrs
CB1
Vl
Local
0.6 V
LB
Crs
Local Vls
Sense
R1
R2
RF
Vo
FB
Low
Pass Cf
S1 R4
R5
CB2
PHASE
Cph
R3
S2
Vhvl
F1
DAC Vdac
CF 1.25 V
F2
To
Logic P16
Osc 4 LSB 4MSB
8-Bit Counter
P 256
A/D u/d
Comparator
& Tracking
Up/Down
Control
Switch
Digital
Duty Cycle
Generator
U/D
Counter
u/d
Np
MC33099
VDD
Regulator
Vfb
Bandgap
Reference
VDD
(OTC)
Vref
1.25 V (2.0 V)
(5.0 V)
Cuv UV
1.25 V
Min Duty
Cycle
Internal
V reg
and Bias
Current
Charge
Pump
Regulator
Vg
lpu
A
N
S3
D
4
GATE
Over
Voltage
Detect
LD
OV
Cdc
OR1
Gate
Polling
Css
Ign
Delay
Batt
VTssc lpd
Z1
SOURCE
IGN
MUX
A
N
D
3
A
N
D
1
Cign 1.25V
VTigm Iign
Batt
VTdsc
Drain
Cds
Polling
LAMP
A Lamp
Z2 DRAIN
OR2
N
D
2
Driver
Circuit
LAMP
GATE
Lamp
Polling
Thermal
Limit
Dtl
Current
Limit
Rs
Field
500
Ignition
Battery
LCR TEST
LCR1 LRC2
Stator
Alternate S tator
Configuration
Boundry for IC
AGND
GND
Ground
REMOTE
PHASE
Figure 2. 33099 Simplified Internal Block Diagram
33099
2
Analog Integrated Circuit Device Data
Freescale Semiconductor


Part Number 33099
Description Adaptive Alternator Voltage Regulator
Maker Freescale Semiconductor
Total Page 18 Pages
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