-
Part Symbol
-
Footprint
-
3D Model
Available Download Formats
By downloading CAD models, you agree to our Terms & Conditions and Privacy Policy
Part Details for UC3845AD by Texas Instruments
Results Overview of UC3845AD by Texas Instruments
- Distributor Offerings: (7 listings)
- Number of FFF Equivalents: (3 replacements)
- CAD Models: (Available)
- Number of Functional Equivalents: (10 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Consumer Electronics
Energy and Power Systems
Renewable Energy
UC3845AD Information
UC3845AD by Texas Instruments is a Switching Regulator or Controller.
Switching Regulator or Controllers are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Price & Stock for UC3845AD
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
|
DISTI #
27AJ1038
|
Newark | Pwm Controller Current Mode, Smd, Input Voltage:25V, Output Voltage:5.1V, Output Current:200Ma, Supply Voltage Min:12V, Supply Voltage Max:25V, Controller Ic Case Style:Soic, No. Of Pins:14Pins, Frequency:500Khz, Operating Rohs Compliant: Yes |Texas Instruments UC3845AD RoHS: Compliant Min Qty: 1 Package Multiple: 1 Date Code: 1 Container: Bulk | 0 |
|
$1.4500 / $1.8500 | Buy Now |
|
DISTI #
2156-UC3845AD-ND
|
DigiKey | IC REG CTRLR MULT TOP 14SOIC Min Qty: 1 Lead time: 12 Weeks Container: Bulk MARKETPLACE PRODUCT |
76645 In Stock |
|
$0.7500 | Buy Now |
|
DISTI #
296-UC3845AD-ND
|
DigiKey | IC REG CTRLR MULT TOP 14SOIC Min Qty: 1 Lead time: 12 Weeks Container: Tube |
196 In Stock |
|
$0.5864 / $1.2400 | Buy Now |
|
DISTI #
595-UC3845AD
|
Mouser Electronics | Switching Controllers Current Mode A 595-UC3845ADTR RoHS: Compliant | 667 |
|
$0.5860 / $1.2400 | Buy Now |
|
DISTI #
J56:1989_00135427
|
Arrow Electronics | Current Mode PWM Controller -0.1V to 11V 1A 500kHz 14-Pin SOIC Tube RoHS: Compliant Min Qty: 1000 Package Multiple: 1000 Lead time: 12 Weeks Date Code: 2221 | Europe - 1000 |
|
$0.5238 / $0.5370 | Buy Now |
|
DISTI #
86040305
|
Verical | Current Mode PWM Controller -0.1V to 11V 1A 500kHz 14-Pin SOIC Tube RoHS: Compliant Min Qty: 415 Package Multiple: 1 Date Code: 1101 | Americas - 75975 |
|
$0.9039 | Buy Now |
|
|
Rochester Electronics | UC3845A Current Mode PWM Controller RoHS: Compliant Status: Active Min Qty: 1 | 76645 |
|
$0.4483 / $0.7231 | Buy Now |
Part Details for UC3845AD
UC3845AD CAD Models
UC3845AD Part Data Attributes
|
|
UC3845AD
Texas Instruments
Buy Now
Datasheet
|
Compare Parts:
UC3845AD
Texas Instruments
30V,1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0°C to 70°C 14-SOIC 0 to 70
|
| Pbfree Code | Yes | |
| Rohs Code | Yes | |
| Part Life Cycle Code | Active | |
| Ihs Manufacturer | TEXAS INSTRUMENTS INC | |
| Part Package Code | SOIC | |
| Package Description | GREEN, PLASTIC, SOIC-14 | |
| Pin Count | 14 | |
| Reach Compliance Code | compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Samacsys Manufacturer | Texas Instruments | |
| Analog IC - Other Type | SWITCHING CONTROLLER | |
| Control Mode | CURRENT-MODE | |
| Control Technique | PULSE WIDTH MODULATION | |
| Input Voltage-Max | 28 V | |
| Input Voltage-Min | 8.2 V | |
| Input Voltage-Nom | 15 V | |
| JESD-30 Code | R-PDSO-G14 | |
| JESD-609 Code | e4 | |
| Length | 8.65 mm | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Terminals | 14 | |
| Operating Temperature-Max | 70 °C | |
| Operating Temperature-Min | ||
| Output Current-Max | 1 A | |
| Output Voltage-Max | 5.1 V | |
| Output Voltage-Min | 4.9 V | |
| Output Voltage-Nom | 5 V | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | SOP | |
| Package Equivalence Code | SOP14,.25 | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Peak Reflow Temperature (Cel) | 260 | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 1.75 mm | |
| Supply Current-Max (Isup) | 25 mA | |
| Supply Voltage-Max (Vsup) | 28 V | |
| Supply Voltage-Min (Vsup) | 8.4 V | |
| Supply Voltage-Nom (Vsup) | 11 V | |
| Surface Mount | YES | |
| Switcher Configuration | BUCK-BOOST | |
| Switching Frequency-Max | 500 kHz | |
| Technology | BIPOLAR | |
| Temperature Grade | COMMERCIAL | |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) | |
| Terminal Form | GULL WING | |
| Terminal Pitch | 1.27 mm | |
| Terminal Position | DUAL | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| Width | 3.9 mm |
Alternate Parts for UC3845AD
This table gives cross-reference parts and alternative options found for UC3845AD. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of UC3845AD, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| UC2845ADTR | Texas Instruments | $0.4717 | 30V, 1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 40°C to 85°C 14-SOIC -40 to 85 | UC3845AD vs UC2845ADTR |
| UC2845AD | Texas Instruments | $0.7013 | 30V, 1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 40°C to 85°C 14-SOIC -40 to 85 | UC3845AD vs UC2845AD |
| UC3845ADG4 | Texas Instruments | Check for Price | 30V,1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0°C to 70°C 14-SOIC 0 to 70 | UC3845AD vs UC3845ADG4 |
UC3845AD Frequently Asked Questions (FAQ)
-
The recommended operating voltage range for UC3845AD is 12V to 25V, with a maximum rating of 30V.
-
The oscillator circuit requires two resistors, R1 and R2. Choose R1 to be around 1kΩ to 10kΩ, and R2 to be around 10kΩ to 100kΩ. The ratio of R1 to R2 determines the oscillator frequency.
-
The soft-start pin (SS) is used to gradually increase the output voltage during startup, reducing inrush current and stress on the power supply. Connect a capacitor from SS to GND, and a resistor from SS to VCC. The capacitor value determines the soft-start time.
-
The maximum duty cycle is set by the ratio of the resistors R3 and R4 connected to the CT pin. A higher ratio of R3 to R4 increases the maximum duty cycle.
-
The undervoltage lockout (UVLO) is a feature that prevents the IC from operating below a certain voltage threshold (around 8.5V). This ensures that the IC operates reliably and prevents damage. The UVLO is implemented internally and does not require any external components.