Details, datasheet, quote on part number: CS3843B
PartCS3843B
CategoryPower Management => PWM Controllers => Current Mode PWM Controllers
TitleCurrent Mode PWM Controllers
DescriptionOff-line Current Mode PWM Control Circuit With Very Low Start up Current
CompanyON Semiconductor
DatasheetDownload CS3843B datasheet
Quote
Find where to buy
 
  

 

Features, Applications

Description

The CS384XB provides all the necessary features to implement off-line fixed frequency current-mode control with a minimum number of external components. The family has been optimized for very low start up current (300A, typ).

Off-Line Current Mode PWM Control Circuit with Very Low Start Up Current
Features

Supply Voltage (ICC<30mA)..........................................................Self Limiting Supply Voltage (Low Impedance Source)...................................................30V Output Current...............................................................................................1A Output Energy (Capacitive Load).................................................................5J Analog Inputs (VFB, to 5.5V Error Amp Output Sink Current...............................................................10mA Lead Temperature Soldering Wave Solder (through hole styles only)...................10 sec. max, 260C peak Reflow (SMD styles only)....................60 sec. max above 183C, 230C peak Block Diagram

The CS384XB family incorporates a precision temperature-controlled oscillator with an internally trimmed discharge current to minimize variations in frequency. A precision duty-cycle clamp eliminates the need for an external oscillator when a 50% duty-cycle is used. Duty-cycles of almost 100% are

Other features include pulse-by-pulse current limiting, and a high-current totem pole output for driving capacitive loads, such as the gate of a power MOSFET. The output is LOW in the off state, consistent with N-channel devices. These ICs are available in 8 and 14 lead surface mount (SO) and 8 lead PDIP packages.

possible. On board logic ensures that VREF is stabilized before the output stage is enabled. Ion-implant resistors provide tighter control of undervoltage lockout.

s Very low Start Up Current (300A typ) s Optimized Off-line Control s Internally Trimmed, Temperature Compensated Oscillator s Maximum Duty-cycle Clamp s VREF stabilization before Output Enable s Pulse-by-pulse Current Limiting s Improved Undervoltage Lockout s Double Pulse Suppression s 1% Trimmed Bandgap Reference s High Current Totem Pole Output

Undervoltage Lock-out Circuit Set/ 5V Reset Reference Internal Bias Output Enable NOR V OUT Current Sense Comparator PWM Latch V REF

ON Semiconductor 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)8853600 Fax: (401)8855786 N. American Technical Support: 800-282-9855 Web Site: www.cherrysemi.com

RT=10k, CT=3.3nF for sawtooth mode (see Fig. 3), unless otherwise stated TEST CONDITIONS MIN PARAMETER TYP MAX UNITS

s Reference Section Output Voltage Line Regulation Load Regulation Temperature Stability Total Output Variation Output Noise Voltage Long Term Stability Output Short Circuit s Oscillator Section Initial Accuracy Voltage Stability Temp. Stability Sawtooth Mode (see Fig. 3), TJ=25C Triangular Mode (see Fig. TJ=25C 12VCC25V Sawtooth Mode TMINTATMAX (Note 2) Triangular Mode TMINTATMAX (Note 2) Oscillator peak to peak TJ=25C TMINTATMAX kHz 12VIN25V 1IOUT20mA (Note 2) Line, Load, Temperature (Note 10Hzf10kHz, TJ=25C (Note TA=125C, 1kHrs. (Note V mV mV/C mV mA

s Error Amp Section Input Voltage Input Bias Current AVOL Unity Gain Bandwidth PSRR Output Sink Current Output Source Current VOUT High VOUT Low s Current Sense Section Gain Maximum Input Signal PSRR Input Bias Current Delay to Output s Output Section Output Low Level Output High Level ISOURCE=200mA TJ=25C (Note 2) (Notes 4) VCOMP=5V (Note 3) 12VCC25V (Note V/V ns 2VOUT4V (Note RL=15k to ground RL=15k to VREF A dB MHz mA V

s Output Section: continued Rise Time Fall Time Output Leakage s Total Standby Current Start-Up Current Operating Supply Current VCC Zener Voltage CT=3.3nF ICC=25mA

s Under-Voltage Lockout Section Start Threshold Min. Operating Voltage After Turn On V

Notes: 1. Adjust VCC above the start threshold before setting 15V. 2. These parameters, although guaranteed, are not 100% tested in production.

3. Parameter measured at trip point of latch with VFB=0. 4. Gain defined as: A= VCOMP VSense ; 0 VSense 0.8V.

14L SO Narrow COMP VFB Sense OSC Gnd Pwr Gnd VOUT VCCPwr VCC VREF NC Error amp output, used to compensate error amplifier Error amp inverting input Noninverting input to Current Sense Comparator Oscillator Timing Network with Capacitor to Ground, resistor to VREF Ground Output driver Ground Output drive pin Output driver positive supply Positive power supply Output of 5V internal reference No Connection


 

Related products with the same datasheet
CS3842BGD14
CS3842BGD8
CS3842BGDR14
CS3842BGDR8
CS3842BGN8
CS3843BGD14
CS3843BGD8
CS3843BGDR14
CS3843BGDR8
CS3843BGN8
Some Part number from the same manufacture ON Semiconductor
CS3843BGD14 Off-line Current Mode PWM Control Circuit With Very Low Start up Current
CS3844 Current Mode PWM Control Circuit With 50% Max Duty Cycle
CS3844GD8 1A, 52kHz, Current Mode PWM Control Circuit With 16V Uvlo Threshold And 48% Max Duty Cycle, Package: Soic, Pins=8
CS3844GDR14 Current Mode PWM Control Circuit With 50% Max Duty Cycle
CS3844GDR8 Current Mode PWM Control Circuit With 50% Max Duty Cycle , Package: Soic, Pins=8
CS3844GDW16 Current Mode PWM Control Circuit With 50% Max Duty Cycle
CS3845B
CS3845GD14
CS3845GN8 1A, 52kHz, Current Mode PWM Control Circuit With 16V Uvlo Threshold And 48% Max Duty Cycle, Package: Soic, Pins=8
CS386 Alternator Voltage Regulator Darlington Driver
CS3865C High Performance Dual Channel Current Mode Controller With Enable
CS386H Alternator Voltage Regulator Darlington Driver
CS387
CS387H
CS3972 1.25a High Efficiency Switching Regulator
CS403 5v, 750ma Linear Regulator With Reset
CS403GT5 5.0 V, 750mA Linear Regulator With Resetbar , Package: TO-220, Pins=5
CS403GTVA5 5v, 750ma Linear Regulator With Reset
CS4101 Precision Air-core Tach/speedo Driver With Separate Function Generator Input
CS4121 Low Voltage Precision Air-core Tach/speedo Driver
CS4122 Triple Air-core Gauge Driver With Serial Input Bus

DTA143ZE : Bias Resistor Transistor

MC10H101MR1 : Quad Or/nOR GATE , Package: Plcc, Pins=20

MC7818ACT : Three-terminal Positive Voltage Regulator

MM3Z12VT1G : Zen SOD323 Reg 0.2W 10V PB Free, Package: SOD-323, Pins=2

MMBZ5231A : Zener Voltage Regulators

NTMS4706NR2G : Fet - Single Discrete Semiconductor Product 6.4A 30V 830mW Surface Mount; MOSFET N-CH 30V 6.4A 8-SOIC Specifications: Mounting Type: Surface Mount ; FET Type: MOSFET N-Channel, Metal Oxide ; Drain to Source Voltage (Vdss): 30V ; Current - Continuous Drain (Id) @ 25 C: 6.4A ; Rds On (Max) @ Id, Vgs: 12 mOhm @ 10.3A, 10V ; Input Capacitance (Ciss) @ Vds: 950pF @ 24V ; Power - Max: 830mW ; Packaging:

MMDF3N04HDR2G : Fet - Array Discrete Semiconductor Product 3.4A 40V 1.39W Surface Mount; MOSFET N-CH DUAL 3.4A 40V 8SOIC Specifications: Mounting Type: Surface Mount ; FET Type: 2 N-Channel (Dual) ; Drain to Source Voltage (Vdss): 40V ; Current - Continuous Drain (Id) @ 25 C: 3.4A ; Rds On (Max) @ Id, Vgs: 80 mOhm @ 3.4A, 10V ; Input Capacitance (Ciss) @ Vds: 900pF @ 32V ; Power - Max: 1.39W ; Packaging: Tape & R

NCV553SQ15T1G : Pmic - Voltage Regulator - Linear (ldo) Integrated Circuit (ics); IC REG LDO 180MA 1.5V SC82AB Specifications: Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant

 
0-C     D-L     M-R     S-Z