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Power Factor Controllers | NCP1623
Critical Conduction Mode (CrM) Power Factor Correction Controller, Follower Boost
概览
The NCP1623 is a controller designed to drive PFC boost stages. Based on an innovative Valley Synchronized Frequency Fold-back (VSFF) method, it operates in critical conduction mode (CrM) until the power drops below a threshold level. The PFC controller enters discontinuous conduction mode (DCM) with increased dead-time as the load further decays (frequency foldback). VSFF maximizes the efficiency at both nominal and light loads. In addition, an internal circuitry ensures a near-unity power factor even when the switching frequency is reduced.
Housed in a TSOP-6 package, the circuit also incorporates the features necessary for robust and compact PFC stages, with few external components. The A version provides the follower boost capability for drastic low-line efficiency improvement. This controller is also available in the SOIC-8 package, which features an ultra-low-consumption mode externally controlled by the disable pin.
应用
- Power Factor Correction
- Offline Power Supply
终端产品
- USB PD Mobile & Laptop Charging
- Industrial Power Supplies
- Computing Power Supplies
- Gaming Power Supplies
特性
- Critical Conduction Mode (CrM) in heavy load conditions
- Discontinuous Conduction Mode (DCM) with Frequency Foldback in light load
- Follower Boost capability (NCP1623A only)
- Sleep Mode with circuit consumption below 100 µA (SOIC-8 version only)
- Zero Current Detection via Drain sensing
- Dynamic Response Enhancer
- Near unity power factor over the load range
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NCP1623ASNT1G
Active
Pb
A
H
P
TSOP-6
1
260
REEL
3000
F
CRM
Variable
Current Mode
Step-Up
Variable
30
500 / 800
10.5
Yes
Yes
No
$0.3267
More Details
NCP1623CDR2G
Active
Pb
A
H
P
SOIC-8
1
260
REEL
2500
F
CRM
Variable
Current Mode
Step-Up
Variable
30
500 / 800
10.5
Yes
Yes
No
$0.3912
More Details
NCP1623ADR2G
Active
Pb
A
H
P
SOIC-8
1
260
REEL
2500
F
CRM
Variable
Current Mode
Step-Up
Variable
30
500 / 800
10.5
Yes
Yes
No
$0.3912
More Details
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