AMG-LM302 Datasheet, PDF (9/23 Pages) alpha microelectronics gmbh – Ballast Controller for Metal Halide Lamps

AMG-LM302
Ballast Controller for Metal Halide Lamps
PIN Symbol
#
29 Vref
30 Pof
31 Po
32 CP
33 Bdis
34 BR
35 nBR
36 nc
37 nc
38 CDT
39 PWMo
40 nc
41 Ipk
42 Iouti
43 nc
44 Vouti
45 Vouts
46 CTRLo
47 FB
48 nc
1)
Description
2.5V internal Vref, may also be used for external circuitry, needs a C
PFC voltage control input
PFC phase control input
Compensation output for PFC regulation low pass filter (20Hz)
Bdis=H: disables the full bridge for the lamp, all driver outputs = L
Output to drive low and corresponding high side of the bridge
Inverted BR, drives other low and high side (dead time inserted
automatically)
Capacitor (connected to AGNDH) sets dead time of the MOSFETS
PWM output of the HV-driver for the buck power MOS
Current mode control input for PWM driver of CDM part
limiting the peak driver current
Monitors the lamp current with a sense resistor, lamp power is
calculated using Iouti*Vouti
Voltage divider input to sense the lamp voltage with respect to
AGNDH (99:1)
Resistor to convert VOUT in to a related current
This control output generates the feedback for the error amplifier.
Output depends on the operating mode (Lamp current or power)
Feedback input (actual value) to the error amplifier
2.5V (set value) is the other input to the error amplifier
7. Absolute Maximum Ratings
The Absolute Maximum Ratings may not be exceeded under any circumstances.
# Symbol Parameter
1 VS
Supply voltage
2 V15V
Internal supply voltage
3 V5V
Internal supply voltage
4 Iout_s
Power supply output current V15V, V5V
5 IDRV; IPWMp Driver peak current
Min
Max
Unit
-0.3
37
V
-0.3
18
V
-0.3
6.2
V
-5
0.01
mA
-800
800
mA
AMG-LM302 Revision: A
29. Jul. 2010 © All rights reserved Page 9 of 23