ld7578h Leadtrend Technology, ld7578h Datasheet - Page 7

• Manufacturer Part Number: ld7578h
• Description: High Voltage Green-mode Pwm Controller With Over Temperature Protection
• Manufacturer: Leadtrend Technology

Typical Performance Characteristics
Leadtrend Technology Corporation
LD7578H-DS-00 February 2010
Fig. 1 HV Current Source vs. Temperature (HV=500V, Vcc=0V)
18.0
17.2
16.4
15.6
14.8
14.0
1.5
1.3
1.1
0.9
0.7
67
65
63
61
59
57
-40
-40
-40
Fig. 3 UVLO (on) vs. Temperature
Fig. 5 Frequency vs. Temperature
0
0
0
Temperature (°C)
Temperature (°C)
Temperature (°C)
40
40
40
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80
80
80
120 125
120
120 125
7
0.91
0.89
0.87
0.85
0.83
0.81
22.0
21.0
20.0
19.0
18.0
17.0
16.0
11.2
15. 0
10.4
9.6
12
8.8
8
-40
-40
-40
Fig. 6 Green Mode Frequency vs. Temperature
-20
Fig. 4 UVLO (off ) vs. Temperature
Fig. 2 V
0
0
0
Temperature (°C)
20
Temperature (°C)
Temperature (°C)
CS
(off) vs. Temperature
40
40
40
LD7578H
60
80
80
80
100
120 125
120 125
120