Operating Supply Current
:
Number of Outputs
: 1
Mounting Style
: SMD/SMT
Operating Supply Voltage
: 30 V
Duty Cycle (Max)
: 50 %
Switching Frequency
: 500 KHz
Maximum Operating Temperature
: + 85 C
Rise Time
: 50 ns
Fall Time
: 50 ns
Package / Case
: SOIC-14
DescriptionThe UC2845AD is one of the UC2845A series.The UC1842A/3A/4A/5A family of control ICs is a pin for pin compati-ble improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.
Features of the UC2845AD are:(1)Optimized for Off-line and DC to DC Converters; (2)Low Start Up Current (<0.5mA); (3)Trimmed Oscillator Discharge Current; (4)Automatic Feed Forward Compensation; (5)Pulse-by-Pulse Current Limiting; (6)Enhanced Load Response Characteristics; (7)Under-Voltage Lockout With Hysteresis; (8)Double Pulse Suppression; (9)High Current Totem Pole Output; (10)Internally Trimmed Bandgap Reference; (11)500kHz Operation; (12)Low RO Error Amp.
The absolute maximum ratings of the UC2845AD can be summarized as:(1)Supply Voltage (Low Impedance Source):30V; (2)Supply Voltage (ICC mA) :Self Limiting; (3)Output Current:±1A; (4)Output Energy (Capacitive Load):5J; (5)Analog Inputs (Pins 2, 3):-0.3V to +6.3V; (6)Error Amp Output Sink Current:10mA; (7)Power Dissipation at TA 25°C (DIL-8):1W; (8)Storage Temperature Range:-65°C to +150°C; (9)Lead Temperature (Soldering, 10 Seconds):300°C.If you want to know more information such as the electrical characteristics, please download the datasheet in www.seekic.com or www.chinaicmart.com.
Parameters: | Technical/Catalog Information | UC2845AD |
| Vendor | Texas Instruments |
| Category | Integrated Circuits (ICs) |
| PWM Type | Current Mode |
| Number of Outputs | 1 |
| Package / Case | 14-SOIC (3.9mm Width), 14-SOL |
| Packaging | Tube |
| Duty Cycle | 50% |
| Voltage - Supply | 8.4 V ~ 30 V |
| Frequency-Max | 450kHz |
| Buck | No |
| Boost | Yes |
| Flyback | Yes |
| Inverting | No |
| Doubler | No |
| Divider | No |
| Cuk | No |
| Isolated | No |
| Drawing Number | 296; 4040047-3; D; 14 |
| Operating Temperature | -40°C ~ 85°C |
| Lead Free Status | Lead Free |
| RoHS Status | RoHS Compliant |
| Other Names | UC2845AD
UC2845AD
296 11185 5 ND
296111855ND
296-11185-5
|
UC2845AD Data Sheet
