ML4800 ,Power Factor Correction and PWM Controller ComboBlock Diagram1316 1VEAO IEAO POWER FACTOR CORRECTOR VCCVCCTRI-FAULT OVPV17VV VEA REF0.5V +FB+ 7.5V1 ..
ML4800 ,Power Factor Correction and PWM Controller ComboGeneral Description• Internally synchronized leading-edge PFC and trailing- The ML4800 is a control ..
ML4800CP ,Power Factor Correction (PFC) and PWM Controller ComboGeneral Description• Internally synchronized leading-edge PFC and trailing- The ML4800 is a control ..
ML4800CS ,Power Factor Correction (PFC) and PWM Controller ComboGeneral Description• Internally synchronized leading-edge PFC and trailing- The ML4800 is a control ..
ML4800CSX ,Power Factor Correction (PFC) and PWM Controller ComboGeneral Description• Internally synchronized leading-edge PFC and trailing- The ML4800 is a control ..
ML4800IP ,Power Factor Correction (PFC) and PWM Controller Combo ML4800Power Factor Correction and PWM Controller Combo
MMBD701LT1 ,Silicon Hot-Carrier DiodesON SemiconductorMBD701Silicon Hot-Carrier DiodesMMBD701LT1Schottky Barrier DiodesON Semiconductor ..
MMBD701LT3 ,Small Signal Diode3MBD701 MMBD701LT1PACKAGE DIMENSIONSTO–92 (TO–226AC)CASE 182–06ISSUE LABNOTES:1. DIMENSIONING AND T ..
MMBD701LT3 ,Small Signal DiodeELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted)ACharacteristic Symbol Min Typ Max Unit ..
MMBD701LT3 ,Small Signal Diode2I , REVERSE LEAKAGE ( A) C , TOTAL CAPACITANCE (pF)R T, MINORITY CARRIER LIFETIME (ps)I , FOR ..
MMBD717L ,Common Anode, MINIBLOC2I , FORWARD CURRENT (mA)FC , CAPACITANCE (pF)TI , REVERSE CURRENTμ (A)RMMBD717LT1INFORMATION FOR U ..
MMBD717LT1 ,Common Anode Schottky Barrier Diodes3MMBD717LT1SOLDER STENCIL GUIDELINESPrior to placing surface mount components onto a printed The st ..
ML4800
Power Factor Correction and PWM Controller Combo
Features Internally synchronized leading-edge PFC and trailing-
edge PWM in one IC TriFault Detect™ for UL1950 compliance and enhanced
safety Slew rate enhanced transconductance error amplifier for
ultra-fast PFC response Low power: 200µA startup current, 5.5mA operating
current Low total harmonic distortion, high PF Reduced ripple current in storage capacitor between PFC
and PWM sections Average current, continuous boost leading edge PFC PWM configurable for current-mode or voltage mode
operation Current fed gain modulator for improved noise immunity Overvoltage and brown-out protection, UVLO, and soft
start
General DescriptionThe ML4800 is a controller for power factor corrected,
switched mode power supplies. Power Factor Correction
(PFC) allows the use of smaller, lower cost bulk capacitors,
reduces power line loading and stress on the switching FETs,
and results in a power supply that fully complies with
IEC1000-3-2 specification. Intended as a BiCMOS version
of the industry-standard ML4824, the ML4800 includes
circuits for the implementation of leading edge, average
current, “boost” type power factor correction and a trailing
edge, pulse width modulator (PWM). It also includes a
TriFault Detect™ function to help ensure that no unsafe
conditions will result from single component failure in the
PFC. Gate-drivers with 1A capabilities minimize the need
for external driver circuits. Low power requirements improve
efficiency and reduce component costs.
An over-voltage comparator shuts down the PFC section in
the event of a sudden decrease in load. The PFC section also
includes peak current limiting and input voltage brownout
protection. The PWM section can be operated in current or
voltage mode, at up to 250kHz, and includes an accurate
50% duty cycle limit to prevent transformer saturation.
