KK494

TECHNICAL DATA PWM Control Circuit The KKK494 incorporates on a single monolithic chip all the functions required in the construction of a pulse-width-modulation control circuit. Designed primarily for power supply control, the KK494 contains an onchip 5-volt regulator, two error amplifiers, adjustable oscillator, deadtime control comparator, pulse-steering flip-flop, and output-control circuitry. The uncommitted output transistors provide either commonemitter or emitter-follower output capability. Push-pull or single-ended output operation may be selected through the output-control function. The architecture of the KK494 prohibits the possibility of either output being pulsed twice during push-pull operation. • • • • • • 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 KK494 ORDERING INFORMATION KK494N Plastic KK494D SOIC TA = -20°C to 85° C for all packages PIN ASSIGNMENT FUNCTION TABLE Output Control Grounded At Vref Output Function Single-ended or Parallel Output Normal Push-Pull Operation LOGIC DIAGRAM 1 KK494 MAXIMUM RATINGS Symbol VCC VI VO Tstg Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current Storage Temperature Parameter Value 41 VCC +0.3 41 250 -65 to +150 Unit V V V mA °C RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current (Each Transistor) Current Into Feed back Terminal CT RT TA Timing Capacitor Timing Resistor Oscillator Frequency Operating Free-Air Temperature 0.47 1.8 1 -20 Parameter Min 7 -0.3 Max 40 VCC - 2 40 200 0.3 10.000 500 300 +85 Unit V V V mA mA nF KΩ KHz °C 2 KK494 ELECTRICAL CHARACTERISTICS (Temperature -20 ∼ 85°C, VCC = 15 V, f=10 kHz)) Symbol Reference Section Vref Vregin Vregout ∆Vref ISC Output Voltage Output regulation Input regulation Output Voltage change with temperature Short-circuit output current (Note 1) Frequency Standard deviation of frequency (Note 2) Frequency change with voltage Frequency change with temperature IO=1 mA VCC=7 V to 40 V, TA=25°C IO=1 to 10 mA, TA=25°C TA= -20°C to 85°C Vref=0 4.75 5.25 25 15 1 50 V mV mV % mA Parameter Test Conditions Min Max Unit Oscillator Section fOSC δfOSC δfOSC(∆V) δfOSC(∆T) CT=0.01 µF, RT=12 kΩ All values of VCC, CT, RT, TA Constant VCC= 7 V to 40 V, TA=25°C CT=0.01 µF, RT=12 kΩ TA= -20°C to 85°C VI= 0 to 5.25 V VI(pin 4)=0 V Zero duty cycle Maximum duty cycle VO(pin 3)=2.5 V VO(pin 3)=2.5 V VO(pin 3)=2.5 V VCC= 7 V to 40 V LOW HIGH ∆VO=3 V, VO=0.5 to 3.5 V -0.3 VCC - 2 70 100 VCC=40 V, TA=25°C VID=-15 mV to -5 V, VO(pin 3)=0.7 V VID=15 mV to 5 V, VO(pin 3)=3.5 V 65 0.3 -2 dB kHz dB mA mA 0 10 250 1 mV nA µA V 45 3.3 6 14 15 10 2 KHz % % % Dead Time Control Section IIB(2T) DCmax VTHD Input bias current (pin 4) Maximum duty cycle, each output Input threshold voltage (pin 4) Error Amp Section VIO IIO IIB Input offset voltage Input offset current Input bias current Common-mode input voltage range Avol fb CMRR IO IO+ Open-loop voltage amplification Unity-gain bandwidth Common-mode rejection ratio Output sink current (pin 3) Output source current (pin 3) -10 µA % V 3 KK494 ELECTRICAL CHARACTERISTICS (Temperature -20 ∼ 85°C, VCC = 15 V, f=10 kHz)) Symbol VTHP II trc tfc trf tff IC(off) IE(off) VSAT Parameter Input threshold voltage (pin 3) Input sink current (pin 3) Output voltage rise time Output voltage fall time Output voltage rise time Output voltage fall time Collector off-state current Emitter off-state current Collectoremitter saturation voltage IOCH ICC ICCA Total Device Standby supply current Average supply current All other inputs & outputs open V(pin 4)=2 V VCC=15 V VCC=40 V 10 15 17 mA mA Commonemitter Emitterfollower Test Conditions Zero duty cycle VO(pin 3)=0.7 V Common-emitter configuration Common-emitter configuration Emitter-follower configuration Emitter-follower configuration VCE=40 V, VCC=40 V VCC=VC=40 V, VE=0 VE=0, IC=200 mA VC=15 V, IE=-200 mA VI=Vref 0.3 200 100 200 100 100 -100 1.3 2.5 3.5 mA Min Max 4.5 Unit V mA ns ns ns ns µA µA V PWM Comparator Section Switching Characteristics Output Section Output control input current 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 ∑ (x n - x)2 n=1 σ= N–1 4 KK494 N S UFFIX PLAS TIC DIP (MS - 0 0 1 BB) A Dimens ion, mm 16 9 B Symbol A MIN 18.67 6.1 MAX 19.69 7.11 5.33 1 8 B C F L D F 0.36 1.14 2.54 7.62 0° 2.92 7.62 0.2 0.38 0.56 1.78 C -T- SEATING PLAN E G H H J N G D 0.25 (0.010) M T K M J K L M N 10° 3.81 8.26 0.36 NOTES : 1. Dimen s io n s “A ”, “B” d o n o t in clu d e mo ld flas h o r p ro tru s io n s . Maximu m mo ld flas h o r p ro tru s io n s 0.25 mm (0.010) p er s id e. D S UFFIX S OIC (MS - 0 1 2 AC) Dimens ion, mm A 16 9 Symbol A MIN 9.8 3.8 1.35 0.33 0.4 1.27 5.72 0° 0.1 0.19 5.8 0.25 MAX 10 4 1.75 0.51 1.27 H B P B C 1 G 8 C R x 45 D F G -TD 0.25 (0.010) M T C M K SEAT ING PLAN E J F M H J K M P R 8° 0.25 0.25 6.2 0.5 NOTES : 1. Dimen s io ns A an d B d o n o t in clud e mo ld flas h o r p rotru s ion . 2. M aximu m mo ld flas h o r p ro tru s io n 0.15 mm (0.006) p er s id e fo r A ; fo r B ‑ 0.25 mm (0.010) p er s id e. 5