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UC3824NG4 데이터시트(PDF) 1 Page - Texas Instruments |
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UC3824NG4 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 14 page www.ti.com FEATURES DESCRIPTION 4 5 6 7 3 2 1 8 9 15 10 OSC + 1V 1.4V 9V GATE REF GEN Internal Bias 10 4V 14 11 12 13 Output Inhibit VREF Good VCC Good UVLO Shutdown CPRTR I LIM CPRTR Inhibit Wide Bandwidth (Set Dom.) 1.25V PWM Latch (Set Dom.) R S V IN 9mA Clock R T C T Ramp E/A Out NI INV Error Amp Soft Start I LIM/SD V CC Gnd V REF 5.1V Pwr Gnd INV OUT Out V C UC1824 UC2824 UC3824 SLUS326A – MARCH 1997 – REVISED JULY 2007 HIGH SPEED PWM CONTROLLER • Complementary Outputs The UC1824 family of PWM control devices is optimized for high frequency switched mode power • Practical Operation Switching Frequencies to supply applications. Particular care was given to 1 MHz minimizing propagation delays through the • 50-ns Propagation Delay to Output comparators and logic circuitry while maximizing • High Current Dual Totem Pole Outputs (1.5 A bandwidth and slew rate of the error amplifier. This Peak) controller is designed for use in either current mode or voltage mode systems with the capability for input • Wide Bandwidth Error Amplifier voltage feed-forward. • Fully Latched Logic With Double Pulse Protection circuitry includes a current limit Suppression comparator with a 1-V threshold, a TTL compatible • Pulse-by-Pulse Current Limiting shutdown port, and a soft-start pin which doubles as • Soft Start/Maximum Duty Cycle Control a maximum duty cycle clamp. The logic is fully • Under-Voltage Lockout with Hysteresis latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage • Low Start Up Current (1.1 mA) lockout section with 800 mV of hysteresis assures • Trimmed Bandgap Reference (5.1 V ± 1%) low start up current. During under-voltage lockout, the outputs are high impedance. BLOCK DIAGRAM Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 1997–2007, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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