ADP1048 Analog Devices, ADP1048 Datasheet - Page 13

• Manufacturer Part Number: ADP1048
• Description: Digital Power Factor Correction Controller with accurate AC Power Metering
• Manufacturer: Analog Devices

Data Sheet
Table 5. Programmable Options for Fast Overcurrent Protection
Parameter
Debounce Time
Blanking Time
Propagation Delay
Threshold Value and Polarity
Level Shifting Current Sources
Actions for Fast OCP
500mV
0mV
10k × 120µA = 1.2V
LEVEL SHIFTING
ILIM
VDD
Values or Options
40 ns, 80 ns, 120 ns, 240 ns
40 ns, 80 ns, 120 ns, 160 ns, 200 ns, 400 ns, 600 ns, 800 ns
140 ns typical
500 mV (negative); 1500 mV (positive)
60 μA, 80 μA, 100 μA, 120 μA (negative)
20 μA, 40 μA, 60 μA, 80 μA (positive)
Ignore (still terminates the PWM pulse); allow n switching
cycles, then shut down and soft start; allow n switching
cycles, then shut down and wait for PSON signal
60µA TO
120µA
I
L
PGND
ADP1047/ADP1048
500mV
Figure 8. Fast Overcurrent Protection Schemes
Figure 9. Level Shifting and Threshold for OCP
Rev. 0 | Page 13 of 84
OCP
1500mV
0mV
ILIM
VDD
20µA TO
80µA
PGND
I
ADP1047/ADP1048
M
1500mV
10k × 80µA = 0.8V
LEVEL SHIFTING
Comments
Register 0xFE3D, Bits[4:3]
Blanking from the leading edge;
Register 0xFE3D, Bits[2:0]
Fixed value; does not include blanking or
debounce
Fixed values
Register 0xFE3E, Bits[7:5]
n = 1, 2, 4, 8; Register 0xFE00, Bits[7:6]
OCP
ADP1047/ADP1048