DH7
Ballast for 35W Discharge Lamp (DC)
Key Benefits
- Extremely small
- Low input voltage
- Designed for Battery operation
Target Lamps
| Manufacturer | Type |
| OSRAM |
D2S, D2R |
| Philips |
D2S, D2R |
| General Electric |
D2S, D2R |
Product Specification
Input Data
| Nominal Operation | Nominal | Tolerance |
| Input Voltage DC (V) |
13 |
9 - 19 |
| System Wattage (W) |
41 |
39 - 48 |
| Input Current (A) |
3.15 |
2.1 - 3.7 |
| Maximum input current |
6 |
N/A |
Lamp Output Data
| Ignition | Nominal | Tolerance | Remarks |
| Ignition Voltage |
+25 |
+/-5 |
Load capacity <20pF |
| Ignition Time (sec) |
0.4 |
0.2 - 2 |
--- |
| Automatic restart counter |
4 |
--- |
attempts |
| Nominal Operation | Nominal | Tolerance | Remarks |
| Lamp Voltage (V) |
85 |
-20 / +30* |
Depends on lamp |
| Lamp Wattage (W) |
35 (25 - 45) |
+/-5 |
Nominal* |
| Lamp Current (A) |
0.4 |
0.3 - 1 |
Fixed Power Controlled |
*Lamp power is reduced at low input voltage, please refer to figure 2 for power de - rating versus input voltage
Lifetime Data
| | Symbol | Nominal | Tolerance | Remarks |
| Ballast Lifetime |
t Life |
20.000 |
>20.000 |
acc. to MIL HDBK for nominal operation |
Miscellaneous
| Nominal Operation | Nominal | Tolerance |
| Power losses at 13V input voltage and 35W lamp power (W) |
6
---
|
+/-3
---
|
| Efficiency (1) |
0.89 |
0.80 to 0.93 |
| Ambient Temperature (°C) |
+25 |
0 to +50 |
| Max. Temperature at test poin(°C) |
65 |
70 |
| Internal temp. switch off tmperature(°C) |
N/A |
N/A |
Cooling Recommendations
The ballast is designed for convectional cooling. It is recommended that the application uses the surface area of the housing to conduct the heat to the carrying device.
Environmental Requirements
- StorageTemperature Range -20°C to +50°C
- OperationTemperature Range 0°C to +60°C
- Humidity Range non condensing 20% to 95%
- Altitude (operating) ft to 10,000
- Altitude (notoperating) 0 ft to 40,000 ft
CAUTION:
SAFETY:
Because of instant hot restrike, the output voltage on the lamp can reach values of up to + 30000 Volts!
Please ensure that the lamp is inserted in plug before powering up ballast! Power line have meet current requirements.
Specification subject to change without prior notice!
