UC3824

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具有 9.2V/8.4V UVLO 和 85% 占空比、温度范围为 0°C 至 70°C 的增强型 30V、1.5A 双端 PWM 控制器

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数据表

document-pdfAcrobat High Speed PWM Controller 数据表 (Rev. A) (英语)

UC3824

正在供货

数据表

立即订购

产品详情

Rating

Catalog

Topology

Boost, Buck, Secondary side regulator

Vin (max) (V)

30

Control mode

Current, Voltage

Features

Error amplifier, Multi-topology, Soft start, Synchronization pin

Operating temperature range (°C)

0 to 70

Duty cycle (max) (%)

100

Rating

Catalog

Topology

Boost, Buck, Secondary side regulator

Vin (max) (V)

30

Control mode

Current, Voltage

Features

Error amplifier, Multi-topology, Soft start, Synchronization pin

Operating temperature range (°C)

0 to 70

Duty cycle (max) (%)

100

PDIP (N)

16

181.42 mm² 19.3 x 9.4

SOIC (DW)

16

106.09 mm² 10.3 x 10.3

Complementary Outputs
Practical Operation Switching Frequencies to 1 MHz
50-ns Propagation Delay to Output
High Current Dual Totem Pole Outputs (1.5 A Peak)
Wide Bandwidth Error Amplifier
Fully Latched Logic With Double Pulse Suppression
Pulse-by-Pulse Current Limiting
Soft Start/Maximum Duty Cycle Control
Under-Voltage Lockout with Hysteresis
Low Start Up Current (1.1 mA)
Trimmed Bandgap Reference (5.1 V ± 1%)

Complementary Outputs
Practical Operation Switching Frequencies to 1 MHz
50-ns Propagation Delay to Output
High Current Dual Totem Pole Outputs (1.5 A Peak)
Wide Bandwidth Error Amplifier
Fully Latched Logic With Double Pulse Suppression
Pulse-by-Pulse Current Limiting
Soft Start/Maximum Duty Cycle Control
Under-Voltage Lockout with Hysteresis
Low Start Up Current (1.1 mA)
Trimmed Bandgap Reference (5.1 V ± 1%)

The UC1824 family of PWM control devices is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current mode or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft-start pin which doubles as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800 mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.

The UC1824 family of PWM control devices is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current mode or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft-start pin which doubles as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800 mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.

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