AMG-LM302 Datasheet, PDF (17/23 Pages) alpha microelectronics gmbh – Ballast Controller for Metal Halide Lamps

AMG-LM302
Ballast Controller for Metal Halide Lamps
9. Flow Chart
Working Mode
Brid ge pha se:
M1 M2
M3 M4
Phase "0" - M3, M4 ON
Phase "1" - M1, M4 ON
Phase "2" - M2, M3 ON
Phase "3" - M1,M4/M2,M3 switching
M0 - Initial Mode:
Function Flow Chart CDM
Power ON
(In this case the used P_Lamp=150W)
Enable to ON? ⁿ
VS > 24V
Vref -> ON
OT -> OK
V5V -> OK
y
DC diagnosis
Break
Restart
Durable watch:
OT -> fail
V15V< 9.5V
M1 - PFC on Mode:
Bridge disabled
All DC OK
n
y
Generate
V _PFC=400V
Flag=H
Description
Standby --> Currentless
Break the flow by detection of a
fundamental error
New start by switch off, on the
mains voltage or by EN -->
Break the flow by over
temperature
Restart the flow by power
supply error
Flag signalize the lamp state:
- H -> break phase
- L -> PFC + HID charge phase
- blink -> Ignition phase
- H -> steady-state
V_PFC runs to 400V.
M2 - CDM charge
Mode:
Bridge phase "0"
M3 - Ignition Mode:
Bridgeepahcahsselo"p3"sft_SaWrt=s100Hz
N pulses@f_SW=125kHz;
Tw=1200s (dig.
Timer)
V_PFC > 350V
n
y
Generate
V _{OU T}=350V
I_OUT > I_short
y
n
V_OUT > 290V
n
y
Burst 4kV
y
Tw > 1200s
If V_PFC will be reach 350V the
flow switched in the next mode
The lamp controller start to
charge the VOUT up to V_PFC for
lamp ignition
A short circuit will be detected
continuous. If I_OUT > I_short jump the
flow directly to break.
Ignition try start if V_OUT is higher
than 290V
Burst for lamp ignition will be
pulsed for a duration of 1200s.
After this time without ignition
goes the flow to break.
Rtd set V_{OUT_th} =160V
Tw=300s (dig. Timer)
VI_OOUUT(^T_1<>AI1)^IG6^N0^sV
n
y
y
start
Tw > 300s
M4 - Overdrive Mode:
Bridge phase "3"
f _{S W} =100Hz
R_ML set I_OUT=2.6A
Lamp current 2.6A
M5 - Steady-state
Mode:
Zeichenblatt-1_09.03.09
Calculate:
P_OUT=I_OUT*V_OUT
Bridge phase "3"
f _{S W} =100Hz
RM_P set P=150W
const. regulation
Rtu set V_{OUT_th}=50V
Rtd set V_{OUT_th}=160V
P_OUT < 150W
y
n
Lamp power 150W
V_OUT > 50V
V_OUT < 160V
n
AMG-LM302 Revision: A
29. Jul. 2010
The CMD lamp is ignite
successful when the lamp
voltage is lower than 160V
Successfull ignition starts 300s
tracking timer to test the lamp
voltage V_OUT. 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.
Steady-state mode (M5) is
power constant mode.
Monitoring the state of the HID
lamp in the course of the steady-
state continuous operation
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