UC2824N集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

UC2824N属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由德州仪器制造生产的UC2824NDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。

FEATURES

· 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%)

DESCRIPTION

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.