NCP1236: Controller, Fixed Frequency, Current Mode, for Flyback Converters
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The NCP1236 is a new fixed-frequency current-mode controller featuring Dynamic Self-Supply (DSS). This device is pin-to-pin compatible with the previous NCP12xx families.
The DSS function greatly simplifies the design of the auxiliary supply and the VCC capacitor by activating the internal startup current source to supply the controller during transients.
Due to frequency foldback, the controller exhibits excellent efficiency in light load condition while still achieving very low standby power consumption. Internal frequency jittering, ramp compensation, and a versatile latch input make this controller an excellent candidate for converters where component cost is the key constraint.
In addition, the controller includes a new high voltage circuitry that combines a startup current source and a brown-out detector able to sense the input voltage either from the rectified ac line or the dc filtered bulk voltage. The high voltage sensing circuitry is used for the overpower protection purposes as well. Overpower protection, overload protection, and other protective features increase the safety and reliability of the final application.
The DSS function greatly simplifies the design of the auxiliary supply and the VCC capacitor by activating the internal startup current source to supply the controller during transients.
Due to frequency foldback, the controller exhibits excellent efficiency in light load condition while still achieving very low standby power consumption. Internal frequency jittering, ramp compensation, and a versatile latch input make this controller an excellent candidate for converters where component cost is the key constraint.
In addition, the controller includes a new high voltage circuitry that combines a startup current source and a brown-out detector able to sense the input voltage either from the rectified ac line or the dc filtered bulk voltage. The high voltage sensing circuitry is used for the overpower protection purposes as well. Overpower protection, overload protection, and other protective features increase the safety and reliability of the final application.
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Technical Documentation & Design Resources
Design Notes (1) | Package Drawings (1) |
Application Notes (1) | Videos (1) |
Data Sheets (1) | Evaluation Board Documents (4) |
Evaluation/Development Tool Information
Product | Status | Compliance | Short Description | Action | |
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NCP1236B65NBGEVB | Active |
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65 W Notebook Adapter Demonstration Evaluation Board |
Availability & Samples
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Specifications
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Case Outlines
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Application Diagram
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Case Outline |
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NCP1236AD100R2G | Active |
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NCP1236 | SOIC-7 | 751U | 1 | 260 | Tape and Reel | 2500 | $0.3373
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NCP1236AD65R2G | Active |
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NCP1236 | SOIC-7 | 751U | 1 | 260 | Tape and Reel | 2500 | $0.3373 | ||||||||
NCP1236BD100R2G | Active |
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NCP1236 | SOIC-7 | 751U | 1 | 260 | Tape and Reel | 2500 | $0.3373
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NCP1236BD65R2G | Active |
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NCP1236 | SOIC-7 | 751U | 1 | 260 | Tape and Reel | 2500 | $0.3373 | ||||||||
NCP1236DD65R2G | Active |
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NCP1236 | SOIC-7 | 751U | 1 | 260 | Tape and Reel | 2500 | $0.3373 | ||||||||
NCP1236ED100R2G | Obsolete |
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NCP1236, Modified Vcc(min), Vcc(on), and reduced fault timer | SOIC-7 | 751U | 1 | 260 | Tape and Reel | 2500 |
Market Leadtime (weeks) | : | 8 to 12 |
Market Leadtime (weeks) | : | 4 to 8 |
PandS (2020-09-14 00:00) | : | >1K |
Market Leadtime (weeks) | : | 17 to 20 |
Market Leadtime (weeks) | : | Contact Factory |
PandS (2020-09-14 00:00) | : | >1K |
Market Leadtime (weeks) | : | 4 to 8 |
Market Leadtime (weeks) | : | Contact Factory |
Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Control Mode
fsw Typ (kHz)
Stand-by Mode
UVLO (V)
Short Circuit Protection
Latch
Soft Start
VCC Max (V)
Drive Cap. (mA)
Package Type
NCP1236AD100R2G
$0.3373
Pb
A
H
P
Active
Flyback
Current Mode
100
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
NCP1236AD65R2G
$0.3373
Pb
A
H
P
Active
Flyback
Current Mode
65
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
NCP1236BD100R2G
$0.3373
Pb
A
H
P
Active
Flyback
Current Mode
100
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
NCP1236BD65R2G
$0.3373
Pb
A
H
P
Active
Flyback
Current Mode
65
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
NCP1236DD65R2G
$0.3373
Pb
A
H
P
Active
Flyback
Current Mode
65
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
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