IL494A IKSEMICON | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 5

Technical content

The IL494 incorporates on a single m onolithic chip all the functions required in the construction of a pul se-width-modulation control circuit. Designed primarily for power supply control, the IL494 contains an on- chip 5-volt regulator, two error amplifiers, adjustable oscillator, dead- time control comparator, pulse-steering flip-flop, and output-control circuitry. The uncommitted output transistors provide either common- emitter or emitter-follower output capability. Push-pull or single-ended output operation may be selected through the output-control function. The architecture of the IL494 prohibits th e possibility of either output being pulsed twice during push-pull operation.

ORDERING INFORMATION

TA = -20°C to 85° C for all packages

  • Complete PWM Power Control Circuitry
  • Uncommitted Outputs for 200 mA Sink or Source
  • Output Control Selects Single-Ended or Push-Pull Operation
  • Internal Circuitry Prohibits Double Pulse at Either Output
  • Internal Regulator Provides a Stable 5 V Reference Supply
  • Variable Dead-Time Provides Control Over Total Range PIN ASSIGNMENT FUNCTION TABLE Output Control Output Function Grounded Single-ended or Parallel Output At Vref Normal Push-Pull Operation LOGIC DIAGRAM Rev. 00

Rev. 00 MAXIMUM RATINGS Symbol Parameter Value Unit VCC Supply Voltage 41 V VI Amplifier Input Voltage VCC +0.3 V VO Collector Output Voltage 41 V Collector Output Current 250 mA Tstg Storage Temperature -65 to +150 °C RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit VCC Supply Voltage 7 40 V VI Amplifier Input Voltage -0.3 VCC - 2 V VO Collector Output Voltage 40 V Collector Output Current (Each Transistor) 200 mA Current Into Feed back Terminal 0.3 mA CT Timing Capacitor 0.47 10.000 nF RT Timing Resistor 1.8 500 KΩ Oscillator Frequency 1 300 KHz TA Operating Free-Air Temperature -20 +85 °C

Rev. 00 ELECTRICAL CHARACTERISTICS (Temperature -20 ∼ 85°C, VCC = 15 V, f=10 kHz)) Symbol Parameter Test Conditions Min Max Unit Reference Section Vref Output Voltage IO=1 mA 4.95 5.05 V Vregin Output regulation VCC=7 V to 40 V, TA=25°C 25 mV Vregout Input regulation IO=1 to 10 mA, TA=25°C 15 mV ΔVref Output Voltage change with temperature TA= -20°C to 85°C 1 % ISC Short-circuit output current (Note 1) Vref=0 50 mA Oscillator Section fOSC Frequency CT=0.01 μF, RT=12 kΩ 6 14 KHz δfOSC Standard deviation of frequency (Note 2) All values of VCC, CT, RT, TA Constant 15 % δfOSC(ΔV) Frequency change with voltage VCC= 7 V to 40 V, TA=25°C 10 % δfOSC(ΔT) Frequency change with temperature CT=0.01 μF, RT=12 kΩ TA= -20°C to 85°C 2 % Dead Time Control Section IIB(2T) Input bias current (pin 4) VI= 0 to 5.25 V -10 μA DCmax Maximum duty cycle, each output VI(pin 4)=0 V 45 % VTHD Input threshold voltage Zero duty cycle 3.3 V (pin 4) Maximum duty cycle 0 Error Amp Section VIO Input offset voltage VO(pin 3)=2.5 V 10 mV IIO Input offset current VO(pin 3)=2.5 V 250 nA IIB Input bias current VO(pin 3)=2.5 V 1 μA Common-mode input VCC= 7 V to 40 V LOW -0.3 V voltage range HIGH VCC - 2 Avol Open-loop voltage amplification ΔVO=3 V, VO=0.5 to 3.5 V 70 dB fb Unity-gain bandwidth 100 kHz CMRR Common-mode rejection ratio VCC=40 V, TA=25°C 65 dB IO Output sink current (pin 3) VID=-15 mV to -5 V, VO(pin 3)=0.7 V 0.3 mA IO+ Output source current (pin 3) VID=15 mV to 5 V, VO(pin 3)=3.5 V -2 mA

ELECTRICAL CHARACTERISTICS (Temperature -20 ∼ 85°C, VCC = 15 V, f=10 kHz)) Symbol Parameter Test Conditions Min Max Unit PWM Comparator Section VTHP Input threshold voltage (pin 3) Zero duty cycle 4.5 V II Input sink current (pin 3) VO(pin 3)=0.7 V 0.3 mA Switching Characteristics trc Output voltage rise time Common-emitter configuration 200 ns tfc Output voltage fall time Common-emitter configuration 100 ns trf Output voltage rise time Emitter-follower configuration 200 ns tff Output voltage fall time Emitter-follower configuration 100 ns Output Section IC(off) Collector off-state current VCE=40 V, VCC=40 V 100 μA IE(off) Emitter off-state current VCC=VC=40 V, VE=0 -100 μA VSAT Collector- emitter Common- emitter VE=0, IC=200 mA 1.3 V saturation voltage Emitter- follower VC=15 V, IE=-200 mA 2.5 IOCH Output control input current VI=Vref 3.5 mA Total Device ICC Standby supply current All other inputs & VCC=15 V 10 mA outputs open VCC=40 V 15 ICCA Average supply current V(pin 4)=2 V 17 mA Notes: 1. Duration of the short circuit should not exceed one second. 2. Standard deviation is a measure of the statistical disribution about the mean as derived from the formula N ∑ (xn - x)2 n=1 Rev. 00 σ = N – 1

(MS - 001BB) Sym b ol M I N M AX A 18.67 19.69 B 6.1 7.11 C 5.33 D 0.36 0.56 F 1.14 1.78 G H J 0° 10° K 2.92 3.81 NOTES: L 7.62 8.26 1. Dimensions “A”, “B” do not include mold flash or protrusions. M 0.2 0.36 Maximum mold flash or protrusions 0.25 mm (0.010) per side. N 0.38 D SU F F I X SOI C (MS - 012AC) Sym b ol M I N M AX A 9.8 10 B 3.8 4 C 1.35 1.75 D 0.33 0.51 F 0.4 1.27 G H J 0° 8° NOTES: K 0.1 0.25 1. Dim ensions A and B do not include m old flash or protrusion. M 0.19 0.25 5.72 2.54 7.62 1.27 Dimens ion, mm Dimens ion, mm A BH C K C M J F M P G D R x 45 SEA TING PLANE 0.25 (0.010) M T -T- L H M J A B F G D SEATING PLANE N K 0.25 (0.010) M T -T- C Rev. 00