ALPHA-MICRO AMG

AMG-LM302
Ballast Controller for Metal Halide Lamps
1. Functional Description of the AMG-LM302
The AMG-LM302 is a Ballast Controller IC for Metal Halide Lamps (HID, CDM, HQI…).
The AMG-LM302 integrates all functions necessary for control off Metal Halide lamps
including power factor correction (PFC), ignition voltage generation and overdrive, current
supply and power management. The ballast controller specifically supports high stability of
color temperature.
2. Features
PFC






PFC operates in current controlled transition mode (TM) with overvoltage protection
Separate undervoltage lockout for PFC and HID part
Zero current detection for TM operation
Real multiplier for excellent THD
High pulse current driver output for HV Power MOS
Internal reference voltage
HID












Current mode controlled buck converter
Buck converter with Driver for external transistor
Power drive mode for HV MOSFETS
Safe ignition through burst oscillation
30kHz PWM in capture compare mode with maximum duty cycle of 50%
Regulation of lamp power
Slope compensation
Open load and short-circuit detection
Completely adjustable current and power ramp during lamp warm-up period
Full bridge drive for acoustic control
Automatic time control for all function
Monitoring of lamp state
General






Wide supply range of 14.5V to 35V
Low power startup current
Disable function to shut down the ballast and reduce power consumption
Over temperature protection
Short-circuit protected
Ambient temperature range: -25°C to +125°C
 Package: TQFP48
3. Application
The AMG-LM302 is suitable for all application where the light spectrum and color temperature
of the sun, which is given by Metal Halide lamps, are needed. The AMG-LM302 controls the
whole lamp ballast and thus not only provides for a low cost solution, but also one, which is
high quality and easy to design.
AMG-LM302
Revision: A
29. Jul. 2010
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AMG-LM302
Ballast Controller for Metal Halide Lamps
3.1. Example Application Drawing
AMG-DF102
230VAC
Buck
HSD
CDM Lamp
HSD
LSD
LSD
Control
OTh
PWM
PWM
Vc Supply
OVLO
Digital
Control
AMG-LM302
UVLO
PFC
CDM
Figure 1: Simplified application drawing.
3.2. Application Notes
Please see AMG-AN-LM302.
AMG-LM302
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29. Jul. 2010
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AMG-LM302
Ballast Controller for Metal Halide Lamps
Table of Contents
1.Functional Description of the AMG-LM302............................................................................. 1
2.Features................................................................................................................................. 1
3.Application............................................................................................................................. 1
3.1.Example Application Drawing................................................................................................... 2
3.2.Application Notes..................................................................................................................... 2
4.Block Diagram....................................................................................................................... 4
5.Block Descriptions (optional).................................................................................................. 5
6.Pinning / Pad Coordinates..................................................................................................... 6
7.Pin description (optional)....................................................................................................... 8
8.Absolute Maximum Ratings................................................................................................... 8
9.Electrical Characteristics...................................................................................................... 10
9.1.Operational Range................................................................................................................. 10
9.2.DC Characteristics................................................................................................................. 10
9.3.AC Characteristics.................................................................................................................. 14
10.Flow Chart ........................................................................................................................ 16
11.Timing Diagrams................................................................................................................ 17
12.Application......................................................................................................................... 18
12.1.Example Application Circuit(s)............................................................................................. 18
12.2.Calculating PFC Parameters................................................................................................18
12.3.Calculating HID Parameters.................................................................................................19
12.4.Application Notes................................................................................................................. 20
13.IC-Package........................................................................................................................ 20
14.IC-Marking......................................................................................................................... 20
15.Ordering Information.......................................................................................................... 21
16.Notes and Cautions........................................................................................................... 21
16.1.ESD Protection..................................................................................................................... 21
16.2.Storage conditions................................................................................................................ 21
17.Disclaimer.......................................................................................................................... 21
18.Contact Information............................................................................................................ 22
AMG-LM302
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AMG-LM302
Ballast Controller for Metal Halide Lamps
4. Block Diagram
AMG-LM302
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AMG-LM302
Ballast Controller for Metal Halide Lamps
5. Block Descriptions
The whole application for a metal halide lamp needs the following major function blocks:
•
mains rectification
•
PFC
•
lamp power regulation
•
lamp ignition control
•
high voltage bridge
•
bridge drivers
The mains rectification and the high voltage bridge are completely built using discrete
components.
There are two basic options to do the bridge drivers, either discrete or integrated. Alpha
recommends the use of a fully integrated full bridge gate driver AMG-DF102.
The AMG-LM302 does have the PFC, lamp power regulation, ignition control and other
subfunctions integrated.
The PFC part of the AMG-LM302 is a standard power factor correction regulator.
The CDM part contains the power and ignition control of the lamp. For power control the lamp
current Iouti and the lamp voltage Vouti get measured and then multiplied to receive the actual
lamp power. The power is then outputed via the CTRLo pin. It can be manipulated and filtered
by external devices and will then get fed (as the actual value) into an error amplifier via the FB
pin. The error amplifier uses an internal 2.5V reference voltage as the set value. The output of
the error amplifier is fed into a current limiter stage and finally outputed via the PWMo pin. The
signal from the PWMo pin eventually drives the buck converter, thus impacting the bridge
voltage and in turn the lamp power.
A capacitor connected to the COP pin sets the frequency of the internal oscillator. The
oscillator frequency eventually determines the switching frequency of the bridge. The oscillator
frequency needs to be double the resonant frequency of the LC low pass filter for the CDMlamp. The output BR drives a low and it's corresponding high side transistor. The output nBR
is inverted to BR and drives the other low and high side transistors. A dead time is
automatically inserted before the rising edges of BR and nBR so to avoid shoot through. This
dead time can externally be influenced with a capacitor connected to the CDT pin. The
switching frequency of the oscillator should not be high enough, to avoid audible noise from
the plasma in the lamp. It should not be too high either, cause this will increase power
consumption.
There is a control logic, which senses the state of the lamp. For ignition, it will generate a high
AMG-LM302
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29. Jul. 2010
© All rights reserved
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AMG-LM302
Ballast Controller for Metal Halide Lamps
switching frequency on the bridge. For burn state, it will generate a low switching frequency on
the bridge.
The open drain output Flag indicates the current state of the application:
Flag is high impedance = standby, low power mode
Flag is low = start up phase
Flag is changing state between low and high impedance = lamp ignition phase
The Flag output maybe used to drive an LED (with ext. resistor) or as a status indication to
other circuitry.
When the lamp is hot, the ignition phase can be very long (up to 30min.).
For the calculation of the various values of resistors and capacitors, please refer to section 11.
Applications and/or application note AMG-AN-LM302.
AMG-LM302
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29. Jul. 2010
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AMG-LM302
Ballast Controller for Metal Halide Lamps
6. Pinning
CDT
PWMo
Ipk
IOuti
VOuti
VOuts
CTRLo
FB
37
1
Comp
nBR
BR
ISET
Bdis
ɑLM302
YYWW
LLxxyy.z
AGNDH
RMp
Rtd
CP
Po
Rtu
Pof
COP
Vref
Flag
Pi
Act
ZCD
AGNDR
CS
25
Top View
AMG-LM302
Revision: A
PGND
SUB
PWMp
V15V
DRV
V5V
VS
EN
13
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AMG-LM302
Ballast Controller for Metal Halide Lamps
PIN
#
Symbol
1
nc
2
comp
Frequency compensation output of the CDM error amplifier
3
AGNDH
Ground connection for analog circuitry in the CDM part
4
ISET
Adjust bias current with 500kOhm to AGNDH
5
RMp
Adjust steady state lamp current with resistor to AGNDH
6
Rtd
Setting upper voltage threshold for lamp power in the steady-state
mode (<180V) with a resistor to AGNDH
7
Rtu
Setting lower voltage threshold for lamp power in the steady-state
mode (>50V) with a resistor to AGNDH
8
COP
A capacitor from COP to AGNDH together with ISET determines the
PWM and bridge frequency
9
Flag
Indication of CDM-lamp state
- Flag = high impedance => standy or low power mode
- Flag = low => start up phase
- Flag changes between high and low impedance => ignition phase
10
act
Connection with V5V activates the power MOS driver, connection with
PGND or open deactivates the power MOS driver
11
AGNDR
Ground connection for analog circuitry in the PFC part
12
nc
13
nc
14
nc
15
EN
A high level enables the IC and starts operation
a low level puts the IC into standby (reduced power consumption)
16
V5V
Internally generated 5V power supply for analog and digital stages,
may also feed external devices
17
VS
Main supply for the IC, input voltage range 14.5V to 35V
18
V15V
Internally generated 15V power supply for PFC and CDM drivers, may
feed external devices
19
DRV
PFC power MOS Driver output
20
nc
21
PGND
Driver Ground
22
SUB
Substrate, connect to PGND
23
PWMp
Additional power MOS driver supplied with V15V,
activated when pin “act” is connected to V5V
24
nc
25
nc
26
CS
Current sense = peak current detection of PFC
27
ZCD
Zero current sense input for PFC inductor
28
Pi
Mains voltage phase sense input
AMG-LM302
Description
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29. Jul. 2010
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AMG-LM302
Ballast Controller for Metal Halide Lamps
PIN
#
Symbol
Description
29
Vref
2.5V internal Vref, may also be used for external circuitry, needs a C
30
Pof
PFC voltage control input
31
Po
PFC phase control input
32
CP
Compensation output for PFC regulation low pass filter (20Hz)
33
Bdis
Bdis=H: disables the full bridge for the lamp, all driver outputs = L
34
BR
Output to drive low and corresponding high side of the bridge
35
nBR
Inverted BR, drives other low and high side (dead time inserted
automatically)
36
nc
37
nc
38
CDT
Capacitor (connected to AGNDH) sets dead time of the MOSFETS
39
PWMo
PWM output of the HV-driver for the buck power MOS
40
nc
41
Ipk
Current mode control input for PWM driver of CDM part
limiting the peak driver current
42
Iouti
Monitors the lamp current with a sense resistor, lamp power is
calculated using Iouti*Vouti
43
nc
44
Vouti
Voltage divider input to sense the lamp voltage with respect to
AGNDH (99:1)
45
Vouts
Resistor to convert VOUT in to a related current
46
CTRLo
This control output generates the feedback for the error amplifier.
Output depends on the operating mode (Lamp current or power)
47
FB
Feedback input (actual value) to the error amplifier
2.5V (set value) is the other input to the error amplifier
48
nc
1)
7. Absolute Maximum Ratings
The Absolute Maximum Ratings may not be exceeded under any circumstances.
#
Symbol
Parameter
Min
Max
Unit
1
VS
Supply voltage
-0.3
37
V
2
V15V
Internal supply voltage
-0.3
18
V
3
V5V
Internal supply voltage
-0.3
6.2
V
4
Iout_s
Power supply output current V15V, V5V
-5
0.01
mA
5
IDRV; IPWMp
Driver peak current
-800
800
mA
AMG-LM302
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AMG-LM302
Ballast Controller for Metal Halide Lamps
#
Symbol
Max
Unit
6
EDRV; EPWMp Driver peak energy
5
μJ
7
Vinp_hv
High voltage input EN
-0.3
VS+0.3
V
8
VFlag_H
Open drain high voltage
-0.3
VS+0.3
V
9
IFlag_L
Flag ON current
-1.0
5.0
mA
10
Vinp_lv
Low voltage input Pi, CS, Po, Pof, Ipk, COP, act,
CDT, Rtu, Rtd, CM3, RMp, FB, Iouti, Vouti, Vouts
-0.3
V5V+0.3 V
11
Iinp_zcd
Input current ZCD
-10
10
mA
12
Ioutp_hv
High voltage control output BR, nBR, PWMo, Bdis
-1.0
1.0
mA
13
Ioutp_lv
Low voltage control output CP, comp, CTRLo, Vref
-5.0
5.0
mA
14
VISET
Bias adjust input voltage
-0.3
V5V+0.3 V
15
IISET
Bias adjust input current
-200
1
µA
16
AGNDH
AGNDP
PGND
Ground voltages related to substrate (SUB)
-0.3
0.3
V
17
Tstg
Storage temperature
-65
150
°C
18
Rthja
Thermal resistance junction to ambient
tbd
K/W
19
VESD
ESD rating
1
kV
AMG-LM302
Parameter
Revision: A
Min
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AMG-LM302
Ballast Controller for Metal Halide Lamps
8. Electrical Characteristics
8.1. Operational Range
#
Symbol
Parameter
Min
Max
Unit
1
VS
Supply voltage
14.5
35
V
2
Ta
Ambient temperature range
-25
85
°C
Note:
8.2. DC Characteristics
DC characteristics contain the spread of values guarantee within the specified supply voltage
and temperature range and the technology process parameter range unless otherwise
specified.
RISET=500kΩ±0.5%; COP=180pF±0.5%; RPo=RPC=10kΩ±0.5%; RFc=RFB=10kΩ±0.5%; VEN=VS;
Vact=0V; RVOUTA=RVOUTB=RVOUTC=10kΩ±0.5%; Rtd=69.5kΩ; Rtu=250kΩ
Typical characteristics represent the medium of production at VS=27V; Ta=25°C
#
Symbol Parameter
Conditions
Min
Typ
Max
Unit
tbd
tbd
mA
1.0
mA
SECTION: General (G)
SUBSECTION: Supply
1
IVS
Operating supply current
2
IVS_STBY
Standby current
VEN=0V or VS=7V
3
VV15V
Internal DC voltage 15V
VS=16.5V to 35V;
IV15V=-5mA
4
VV15V_drop VS-VV15V
5
VV5V
-10% 15
+10% V
VS=8V ... 16.5V;
IV15V=-5mA
Internal DC voltage 5V
1.5
-10% 5
V
+10% V
SUBSECTION: Over temperature
6
TjOT
Thermal shutdown junction
temperature
130
°C
SUBSECTION: Under voltage lockout (UVLO)
7
VVS_ON
VS turn on threshold
8
VV15V_OFF V15V turn off threshold
24
V
8.5
10.5
V
SUBSECTION: Enable (EN)
9
VEN_H
IC enable
10 VEN_L
IC disable
11 VEN_hys
Switch hysteresis
12 IEN
EN input current
AMG-LM302
Revision: A
3.0
V
1.5
VEN=0V
29. Jul. 2010
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V
500
mV
-5
µA
Page 11 of 23
AMG-LM302
Ballast Controller for Metal Halide Lamps
#
Symbol Parameter
13 IEN
EN input current
Conditions
Min
VEN=VS
-1
Typ
Max
Unit
1
µA
0.8
V
5
µA
2.5
+3%
V
2.5
2.7
V
SUBSECTION: Lamp monitoring
14 VFlag_L
Flag low output voltage
IFlag=5mA
15 IFlag_H
Flag high leakage current
VFlag=VS
0.5
-5
SUBSECTION: Reference voltage
16 Vref
Reference for PFC andHID
17 Vref+I
Reference load capability
-3%
Iref=+5mA
18 Vref-I
Iref=-5mA
2.3
2.5
tbd
2.5
19 VFB
Reference for lamp volta-ge
regulation: 2.5V
tbd
20 VISET
Biasing reference Voltage
tbd
V
tbd
V
2.5
V
21 VPof_OVLO OVLO threshold
2.5
V
22 VOVLO-hys OVLO hysteresis
200
mV
SECTION: Power factor correction (PFC)
SUBSECTION: Over voltage lockout (OVLO)
SUBSECTION: HID enable (Bdis)
23 VPof_Bdis
HID and Bridge enable threshold
2.0
V
24 VBdis-hys
HID and Bridge enable hysteresis
800
mV
25 VBdis_H
Output high voltage, bridge disabled IBdis=-2mA
26 VBdis_L
Output low voltage, bridge enabled
27 VPof_Bdis
HID and Bridge enable threshold
V15V
-1.5
V
IBdis=2mA
1.5
2.0
V
V
SUBSECTION: PFC multiplier
28 VPi
Linear input voltage
3
V
29 MG
Multiplier gain
VPi=0.5V; ΔVCP=3V
1.07
V-1
30 MR
Multiplier ratio
ΔVCS / ΔVPi @Rpk_PFC=1Ohm
ΔVPi=0V ... 0.5V;
VCP=4.7V
3.2
A/V
ΔVPi=0V ... 1.0V;
VCP=2.5V
1.6
A/V
1.75
V
SUBSECTION: PFC current sense
31 VCS
Upper sense clamp reference
VCP=4.7, VPi=1.0V
32 ICS
Input bias current
VCS=1V
33 VCS_offs
(DC) sense offset voltage
34 ttrans
Transition time to DRV
-1
VCP=4.7V, VPi=1.0V,
CDRV=2.2nF
1
µA
10
mV
250
ns
2.5
V
SUBSECTION: PFC error amplifier
35 VPo
Feedback input threshold
AMG-LM302
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29. Jul. 2010
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AMG-LM302
Ballast Controller for Metal Halide Lamps
#
Symbol Parameter
Conditions
Min
Typ
-1
Max
Unit
1
µA
36 IPo
Input bias current
37 AV
Voltage gain
Open loop
38 ICP_L
Pos. current capability
VCP=2.5V; VPo=3.25V
3
mA
39 ICP_H
Neg. current capability
VCP=2.5V; VPo=1.75V
-2
mA
40 VCP_H
Upper output voltage limit
ICP=-0.5mA
41 VCP_L
Lower output voltage limit
ICP=0.5mA
60
dB
V5V1.0
V
1.0
V
SUBSECTION: Zero current detector (ZCD)
42 VZCD_CLH
Upper clamp voltage
IZCD=3mA
3.2
4.5
V
43 VZCD_CLL
Lower clamp voltage
IZCD=-3mA
0.5
1.7
V
44 VZCD_th
ZCD threshold
45 IZCD_C
Pos. current capability
46 IZCD_C
Neg. current capability
2.5
V
7
mA
-10
mA
SUBSECTION: PFC driver
47 VDRV_H
Driver output high drop voltage
related to V15V
IDRV=-20mA
0.5
V
48 VDRV_H
Driver output high drop voltage
related to V15V
IDRV=-200mA
2.0
V
49 VDRV_L
Driver output low voltage
IDRV=20mA
0.3
V
50 VDRV_L
Driver output low voltage
IDRV=200mA
1.5
V
51 IDRV_pk
Driver peak current
2.2nF from DRV to
PGND
400
mA
51 IDRV_dis
Disable driver current
VEN=0V or VS=7V;
VDRV=1V
5
mA
SECTION: HID controller (HID)
SUBSECTION: Lamp voltage V/I convert
52 Vouti_OV
Overvoltage threshold
3.45
V
53 Vouti_bst
Ignition try threshold (burst)
2.9
V
54 Vouti_ign
Ignition OK threshold
1.8
V
55 Vouti_bu
Upper break voltage
1.8
V
56 Vouti_bd
Lower break voltage
0.5
V
57 IVOUTi
Input current
-1
1
µA
SUBSECTION: Lamp current V/I convert
58 VIouti
Constant regulation
59 IIouti
Iouti input current
625
-1
mV
1
µA
SUBSECTION: Oscillator
60 ICOP_up
Pull_up current
AMG-LM302
Revision: A
VCOP=1V
29. Jul. 2010
-70
© All rights reserved
µA
Page 13 of 23
AMG-LM302
Ballast Controller for Metal Halide Lamps
#
Symbol Parameter
61 ICOP_down
Pull_down current
62 VCOP_thH
63 VCOP_thL
Conditions
Min
VCOP=4V
Typ
Max
Unit
105
µA
Sawtooth upper threshold
3.33
V
Sawtooth lower threshold
1.67
V
2.5
V
SUBSECTION: HID error amplifier
64 VFB
Feedback voltage
closed loop
65 IFB
FB input current
67 Vcomp
comp output voltage
Icomp=-2mA; closed loop
68 Vcomp
comp output voltage
Icomp=3mA; closed loop
69 Vcomp_H
comp high output voltage
Icomp=-0.5mA; VFB=2V
70 Vcomp_L
comp low output voltage
Icomp=0.5mA; VFB=3V
-1
1
2.0
µA
V
3.0
V5V1.0
V
V
1.0
V
SUBSECTION: Pulse width modulator (PWMo)
71 DCmax
Maximum duty cycle
50
72 DCmin
Minimum duty cycle
73 VIpk_max
Maximum IPK voltage
1.25
V
74 VIpk_OC
Over current IPK voltage
2.5
V
75 VPWMo_H
Output high voltage
IPWMo=-2mA
76 VPWMo_L
Output low voltage
IPWMo=2mA
1.5
V
1.5
%
2.3
5
V15V
-1.5
%
V
SUBSECTION: HID driver (PWMp)
77 VPWMp_H
Driver output high drop voltage
related to V15V
IPWMp=-20mA; Vact=V5V
0.5
V
78 VPWMp_H
Driver output high drop voltage
related to V15V
IPWMp=-200mA;
Vact=V5V
2.0
V
79 VPWMp_L
Driver output low voltage
IPWMp=20mA; Vact=V5V
0.3
V
80 VPWMp_L
Driver output low voltage
IPWMp=200mA; Vact=V5V
1.5
V
81 IPWMp_pk
Driver peak current
2.2nF from PWMp to
PGND; Vact=V5V
400
mA
82 IPWMp_dis
Disable driver current
VEN=0V or VS=7V;
VPWMp=1V
5
mA
83 Vact_H
PWMp driver activated
3.5
V
84 Vact_L
PWMp driver deactivated
85 Iact
pull down current
1.5
Vact=5V
10
V
µA
SUBSECTION: Acoustic bridge driver
86 VBR_H
Output high voltage
IBR=-2mA
87 VBR_L
Output low voltage
IBR=2mA
88 VnBR_H
Output high voltage
InBR=-2mA
AMG-LM302
Revision: A
29. Jul. 2010
V15V
-1.5
V
1.5
V5V1.5
© All rights reserved
V
V
Page 14 of 23
AMG-LM302
Ballast Controller for Metal Halide Lamps
#
Symbol Parameter
89 VnBR_L
Conditions
Output low voltage
Min
Typ
InBR=2mA
Max
Unit
1.5
V
SUBSECTION: Power scale
90 VRMp
Reference voltage for power scale
resistor
2.5
V
SUBSECTION: Adjustable voltage threshold
91 VRtd
Upper reference voltage for
adjustable monitor resistor
2.5
V
92 VRtu
Lower reference voltage for
adjustable monitor resistor
2.5
V
8.3. AC Characteristics
AC characteristics contain the spread of values guarantee within the specified supply voltage
and temperature range and the technology process parameter range unless otherwise
specified.
RISET=500kΩ±0.5%; COP=180pF±0.5%; RPo=RPC=10kΩ±0.5%; RFc=RFB=10kΩ±0.5%; VEN=VS;
Vact=0V; RVOUTA=RVOUTB=RVOUTC=10kΩ±0.5%; Rtd=69.5kΩ; Rtu=250kΩ
Typical characteristics represent the medium of production at VS=27V; Ta=25°C
#
Sym
bol
Parameter
Conditions
1
tr_DRV
PFC driver output rise time
CDRV=2.2nF
50
ns
2
tf_DRV
PFC driver output fall time
CDRV=2.2nF
50
ns
3
FDRV
PFC frequency range over one
mains period
20
4
FOSC
Oscillator frequency
COP=100pF
240
kHz
5
tr_PWMo PWM output rise time
CPWMo=100pF
100
ns
6
tf_PWMo PWM output fall time
CPWMo=100pF
100
ns
7
tr_PWMp PWM power output rise time
CDRV=2.2nF
50
ns
8
tf_PWMp PWM power output fall time
CBR=100pFCDRV=2.2nF
50
ns
9
FPWMo PWM switch frequency
CBR=100pFCDRV=2.2nF
FOSC
8
kHz
CBR=100pFCDRV=2.2nF
FOSC
2
kHz
10 FBR_IG Ignition resonance frequency
Min
Typ
Max Uni
t
20
N
120
kHz
11 tr_BR
Bridge driver output rise time
CBR=100pFCDRV=2.2nF
100
ns
12 tf_BR
Bridge driver output fall time
CBR=100pF
100
ns
13 FBR_A
Bridge acoustic switch frequency
FOSC
211
Hz
14 tIt_on
Ignition burst enable time
AMG-LM302
Revision: A
s
29. Jul. 2010
© All rights reserved
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AMG-LM302
Ballast Controller for Metal Halide Lamps
#
Sym
bol
Parameter
Conditions
Min
Typ
Max Uni
t
15 tIt_off
Ignition burst disable time
2 23
FOSC
16 Nip
Number of ignition pulses for one
burst
2 23
FOSC
17 tIb
Ignition burst repeat rate
10
s
18 tTI
Total ignition trial time
210
FOSC
s
19 tbtM
Lamp voltage monitor block time
after ignition (tracking timer)
17 * 2 24
FOSC
s
AMG-LM302
Revision: A
29. Jul. 2010
© All rights reserved
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AMG-LM302
Ballast Controller for Metal Halide Lamps
9. Flow Chart
Working Mode
Function Flow Chart CDM
Description
Bridge phase:
Power ON
Standby --> Currentless
Break the flow by detection of a
fundamental error
New start by switch off, on the
mains voltage or by EN -->
M1 M2
Break
(In this case the used PLamp =150W)
M3 M4
Enable to ON?
Phase "0" - M3, M4 ON
Phase "1" - M1, M4 ON
Phase "2" - M2, M3 ON
Phase "3" - M1,M4/M2,M3 switching
n
Durable watch:
y
M0 - Initial Mode:
VS > 24V
Vref -> ON
OT -> OK
V5V -> OK
DC diagnosis
All DC OK
Restart
n
OT -> fail
Break the flow by over
temperature
V15V< 9.5V
Restart the flow by power
supply error
Flag=H
Flag signalize the lamp state:
- H -> break phase
- L -> PFC + HID charge phase
- blink -> Ignition phase
- H -> steady-state
y
M1 - PFC on Mode:
Bridge disabled
Generate
V PFC=400V
V PFC > 350V
V PFC runs to 400V.
If VPFC will be reach 350V the
flow switched in the next mode
n
y
M2 - CDM charge
Mode:
Bridge phase "0"
Generate
V OUT=350V
IOUT > Ishort
The lamp controller start to
charge the VOUT up to VPFC for
lamp ignition
y
A short circuit will be detected
continuous. If IOUT > Ishort jump the
flow directly to break.
n
V OUT > 290V
Ignition try start if VOUT is higher
than 290V
n
y
M3 - Ignition Mode:
Bridge phase "3" fSW =100Hz
each slop starts
N [email protected] =125kHz;
Burst 4kV
Tw=1200s (dig.
Timer)
Rtd set VOUT_th =160V
Burst for lamp ignition will be
pulsed for a duration of 1200s.
After this time without ignition
goes the flow to break.
Tw > 1200s
IOUT > IIGNs
V OUT
< 160V
(1A)
y
The CMD lamp is ignite
successful when the lamp
voltage is lower than 160V
n
y
start
Tw > 300s
Tw=300s (dig. Timer)
M4 - Overdrive Mode:
Bridge phase "3"
f SW =100Hz
RML set I OUT =2.6A
Lamp current 2.6A
Calculate:
POUT=IOUT*V OUT
POUT < 150W
y
y
Successfull ignition starts 300s
tracking timer to test the lamp
voltage VOUT . Is fail goes the flow
to break.
Overdrive mode (M4) stabilize
the plasma of the lamp arc with
a constant current. The voltage
across the lamp is a function of
the lamp temperature. If the lamp
power is equal 150W the lamp
slides to the next mode.
n
M5 - Steady-state
Mode:
Bridge phase "3"
f SW =100Hz
RMP set P=150W
const. regulation
Lamp power 150W
Rtu set V OUT_th =50V
Rtd set VOUT_th =160V
V OUT > 50V
V OUT < 160V
Steady-state mode (M5) is
power constant mode.
Monitoring the state of the HID
lamp in the course of the steadystate continuous operation
n
Zeichenblatt-1_09.03.09
AMG-LM302
Revision: A
29. Jul. 2010
© All rights reserved
Page 17 of 23
AMG-LM302
Ballast Controller for Metal Halide Lamps
10. Timing Diagrams
V
400V
VPFC
350V
330V
290V
160V
ignition
detected
~
VRtd
observation window
after 300s trecking time
50V
Vout
VRtu
~
35V
VS
24V
15V
V15V
5V
V5V
all DC ok
t
start PFC
start Vout
15V
Bdis
t
duty cycle
=50%
BR
nBR
15V
BR=H: 4ms
burst (10-pulses)
V
t
nBR=H: 4ms
4kV
~
~
lamp ignition
+350V
VOUT
t
VLamp
-350V
~
~
P/I
P Lamp
t
ILamp
DC mode
Start-up
Ignition mode
Constant current mode
Constant power mode
Steady state mode with
constant power regulation
Wf1_K2f_10.03.09
AMG-LM302
Revision: A
29. Jul. 2010
© All rights reserved
Page 18 of 23
AMG-LM302
Ballast Controller for Metal Halide Lamps
11. Application
The chip set AMG-LM302 and AMG-DF102 are suitable to drive
11.1. Example Application Circuit(s)
Figure 2: Example Application Circuit
11.2. Calculating PFC Parameters
Vrmain _ pk
= Vrmain _ pk ⋅ 10 3
1) Startup resistor (6.2-G.2):
R start ≤
2) Input phase voltage divider (6.2-PFC-5):
R Pi 2
3
≤
R Pi1 + R Pi 2 V rmain _ pk
3) VS voltage limitation (6.1-1):
VZD ≤ VS max
4) Output phase voltage divider:
R Po 2
2.5
=
R Po1 + R P 02 VPFC
5) Frequency compensation:
C Po = tbd
AMG-LM302
Revision: A
29. Jul. 2010
IVS _ STBY
© All rights reserved
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AMG-LM302
Ballast Controller for Metal Halide Lamps
6) Over voltage and PFC ready voltage divider
R Pof 2
2.5
=
R Pof 1 + R Pof 2 VPFC _ OV
7) PFC current sense resistor (6.2-PFC-9):
R pk _ PFC ≤
VCS _ cl
I PK _ PFC
=
1.75
I PK _ PFC
11.3. Calculating HID Parameters
1) Biasing resistor:
R ISET = 510kΩ
2) Lamp voltage divider:
RVOUTC
1
=
RVOUTC + RVOUTB 100
RVOUTA = 10kΩ
3) CDM current sense resistor:
R ML =
4) Power scale resistor:
R Mp =
5) Oscillator capacitor:
COP =
VIOUTi
I overdrive
=
0.625
I overdrive
3.906 ⋅ 10 6
PLamp ⋅ R ML
I COP _ up ⋅ I COP _ down
(
FOSC ⋅ (I COP _ down − I COP _ up ) ⋅ VCOP _ thH − VCOP _ thL
COP =
)
12.6
FOSC ⋅ R ISET
6) Upper true voltage threshold:
R td =
1.25 ⋅ 10 7
VOUT _ th
for VOUT _ th = 160V
7) Lower true voltage threshold:
R tu =
1.25 ⋅ 10 7
VOUT _ th
for VOUT _ th = 50V
8) Bridge dead time capacitor
CDT ≈ 1.67 ⋅ 10 − 5 ⋅ t DT
9) Capacitor and resistor for frequency compensation at FPWMo=31kHz
RQ = 100kΩ
R F = tbd
C F 1 = tbd
C F 2 = tbd
AMG-LM302
Revision: A
29. Jul. 2010
© All rights reserved
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AMG-LM302
Ballast Controller for Metal Halide Lamps
11.4. Application Notes
AMG-AN-LM302
12. IC-Package
TQFP48 (7*7, 48L)
MS-026
S
y
m
b
o
l
ABC
Square
MIN
NOM
MAX
A
1.00
1.10
1.20
A1
0.05
0.10
0.15
A2
0.95
1.00
1.05
D
9.00 BSC
D1
7.00 BSC
E
9.00 BSC
E1
7.00 BSC
N
48
e
0.50 BSC
b
0.17
0.22
0.27
b1
0.17
0.20
0.23
N
o
t
e
s
Tolerance of form and position
ccc
0.08
ddd
0.08
13. IC-Marking
ɑLM302
4 digits date code = 2 digits year + 2 digits work week
8 digits lot number = 2 digits fab process + 4 digits lot number + 1 digit sub lot
AMG-LM302
Revision: A
29. Jul. 2010
© All rights reserved
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AMG-LM302
Ballast Controller for Metal Halide Lamps
14. Ordering Information
AMG-LM302-ITQ48T
shipment in trays
15. Notes and Cautions
15.1. ESD Protection
The Requirements for Handling Electrostatic Discharge Sensitive Devices are described in the
JEDEC standard JESD625-A. Please note the following recommendations:
 When handling the device, operators must be grounded by wearing a for the purpose
designed grounded wrist strap with at least 1MΩ resistance and direct skin contact.
 Operators must at all times wear ESD protective shoes or the area should be
surrounded by for ESD protection intended floor mats.
 Opening of the protective ESD package that the device is delivered in must only occur at
a properly equipped ESD workbench. The tape with which the package is held together
must be cut with a sharp cutting tool, never pulled or ripped off.
 Any unnecessary contact with the device or any unprotected conductive points should be
avoided.
 Work only with qualified and grounded tools, measuring equipment, casing and
workbenches.
 Outside properly protected ESD-areas the device or any electronic assembly that it may
be part of should always be transported in EGB/ESD shielded packaging.
15.2. Storage conditions
The AMG-LM302 corresponds to moisture sensitivity classification ML2 , according to JEDEC
standard J-STD-020, and should be handled and stored according to J-STD-033.
16. Disclaimer
Information given in this data sheet is believed to be accurate and reliable. However, no
responsibility is assumed for the consequences of its use nor for any infringement of patents
or other rights of third parties that may result from its use.
The values stated in Absolute Maximum Ratings may under no circumstances be exceeded.
No warranty is given for use in life support systems or medical equipment without the specific
written consent of alpha microelectronics gmbh. For questions regarding the application
please contact the publisher.
The declared data are only a description of the product. They are not guaranteed properties
as defined by law. Examples are given without obligations and cannot give rise to any liability.
Reprinting of this data sheet – or any part of it – is not allowed without the license of the
publisher. Data sheets are subject to change without any notice.
AMG-LM302
Revision: A
29. Jul. 2010
© All rights reserved
Page 22 of 23
AMG-LM302
Ballast Controller for Metal Halide Lamps
17. Contact Information
This data sheet is published by alpha microelectronics gmbh. To order samples or inquire
information please contact:
alpha microelectronics gmbh
Im Technologiepark 1
15236 Frankfurt (Oder)
Germany
[email protected]
www.alpha-microelectronics.de
+49-335-557-1750 (telephone)
+49-335-557-1759 (fax)
© All rights reserved.
AMG-LM302
Revision: A
29. Jul. 2010
© All rights reserved
Page 23 of 23