ld7577gs Leadtrend Technology, ld7577gs Datasheet - Page 7

• Manufacturer Part Number: ld7577gs
• Description: High Voltage Green-mode Pwm Controller With Brown-out Protection
• Manufacturer: Leadtrend Technology

Typical Performance Characteristics
Leadtrend Technology Corporation
LD7577-DS-01 January 2009
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
68
66
64
62
60
58
57
-40
-40
-40
-20
Fig. 3 UVLO (on) vs. Temperature
Fig. 5 TC of Switching Frequency
0
0
0
20
Temperature (°C)
Temperature (°C)
Temperature (°C)
40
40
40
60
www.leadtrend.com.tw
80
80
80
100
120 125
120 125
120
7
0.90
0.89
0.88
0.87
0.86
0.85
11.2
10.4
9.6
23
22
21
20
19
18
17
8.8
12
8
-40
-40
-40
-20
Fig. 6 TC of Green Mode frequency
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
60
LD7577
80
80
80
100
120 125
120 125
120