NCP1607BDR2G ON Semiconductor, NCP1607BDR2G Datasheet - Page 19

• Manufacturer Part Number: NCP1607BDR2G
• Description: IC PFC CONTROLLER CRM 8SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1607BDR2G

• Mode: Critical Conduction (CRM)
• Current - Startup: 23.5µA
• Voltage - Supply: 9.5 V ~ 20 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Switching Frequency: 70 KHz
• Maximum Power Dissipation: 450 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

clamp must first be overcome. This clamp will draw a
maximum of I
and allowing the ZCD pin voltage to drop low enough to
shutdown the part (Figure 40). After shutdown, the
To activate the shutdown feature on ZCD, the internal
Figure 38. OCP Circuitry with Optional External RC
DRV
Shutdown
R
S
Controller Disabled
Controller Enabled
Figure 39. Shutting Down the PFC Stage by Pulling FB to GND (A) or Pulling ZCD to GND (B)
CL(NEG)
Figure 40. Shutdown Comparator and Current Draw to Overcome Negative Clamp
~70 mA
R
optional
5 mA
OUT1
(5.0 mA maximum) before releasing
CS
V
OUT
Filter
C
R
COMP
OUT2
LEB
Shutdown
I
ZCD
+
1
2
3
4
Figure 39(a)
V
V
SDL
CS(limit)
FB
Control
Ct
CS
NCP1607
+
−
V
GND
SDH
DRV
ZCD
V
OCP
CC
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8
7
6
5
19
V
SHUTDOWN MODE
controller into a standby mode of operation. The FB pin can
be pulled below the UVP level (300 mV typical) or the ZCD
pin can be pulled below the V
If the FB pin is used for shutdown (Figure 39(a)), care must
be taken to ensure that no significant leakage current exists
on the shutdown circuitry. This could impact the output
voltage regulation. If the ZCD pin is used for shutdown
(Figure 39(b)), then any parasitic capacitance created by
the shutdown circuitry will add to the delay in detecting the
zero inductor current event.
comparator includes approximately 90 mV of hysteresis to
ensure noise free operation. A small current source (70 mA
typical) is also activated to pull the unit out of the shutdown
condition when the external pull down is released.
CL(NEG)
The NCP1607 allows for two methods to place the
Figure 39(b)
1
2
3
4
L
BOOST
FB
Control
Ct
CS
NCP1607
GND
DRV
ZCD
V
CC
8
7
6
5
~1 V
SDL
R
ZCD
level (200 mV typical).
Shutdown