UNISONIC TECHNOLOGIES CO., LTD KA02 LOW VOLTAGE AUDIO POWER AMPLIFIER DESCRIPTION The UTC KA02 is the audio power amplifier available for low voltage. The UTC KA02 supplies differential outputs for maximizing output swing at low voltages. The UTC KA02 does not need coupling capacitors to the speaker. The gain of this amplifier is controlled easily by two external resistors. FEATURES *Wide operating supply voltage: V CC =2V~V *Low quiescent supply current( I CC =2.mA, typ) *Medium output power (P OUT =20mW at V CC =V, R L =32ohm, THD=0% *Load impedance range: ~00ohm *Mute function (I CC = A, typ) *Minimum number of external parts required. *Low distortion ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing KA02L-D0-T KA02G-D0-T DIP- Tube - KA02G-S0-R SOP- Tape Reel KA02L-D0-T ()Packing Type (2)Package Type (3)Green Package () T: Tube, R: Tape Reel (2) D0: DIP-, S0: SOP- (3) L: Lead Free, G: Halogen Free and Lead Free MARKING DIP- SOP- UTC KA02 2 3 4 Date Code L: Lead Free G: Halogen Free Lot Code of Copyright 20 Unisonic Technologies Co., Ltd
KA02 PIN CONFIGURATIONS PIN NAME DESCRIPTION (+) Analog Ground for the amplifiers. A F capacitor at this pin (with a F capacitor at pin ) provides 2dB (typ) of power supply rejection. Turn-on time of the circuit is affected by the capacitor on this pin. This pin can be used as an alternative input. 2 (-) Amplifier input. The input capacitor and resistor set low frequency roll-off and input impedance. The feedback resistor is connected between this pin and output. 3 Output Amplifier s output. The DC level is about (V CC ~0.V)/2. 4 V CC DC supply voltage is applied to this pin (V CC =2~V). GND Ground pin. Output 2 Amplifier 2 s output. This signal is equal in amplitude, but 0 out of phase with that output, the DC level is about (V CC ~0.V)/2. Mute This pin can be used to power down the IC to converse power, or for muting, or both. When at a logic LOW (less than 0.V), the IC is enabled for normal operation. When at a logic HIGH (2V to V CC ), the IC is disabled. If Mute is open, that is equivalent to a logic LOW. Ripple Rejection A capacitor at this pin increase power supply rejection, and affects turn-on time. This pin can be left open if the capacitor at pin is sufficient. BLOCK DIAGRAM Inverting Non- Inberting 2 - Amp + R R 3 Output - Amp 2 + Output 2 V CC 4 Bias Mute Ripplie Rejection GND UNISONIC TECHNOLOGIES CO., LTD 2 of
KA02 ABSOLUTE MAXIMUM RATINGS (T A =2 C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC -~ V Output Current I OUT +-20 ma Maximum, Ripple Rejection, Mute Pin Voltage V I (max) -~Vcc+ V Applied Output Voltage( Output Pin When Disabled) V OUT -~Vcc+ V Temperature Junction T J - ~ +0 C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. RECOMMENDED OPERATION CONDITIONS (T A =2 C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 2~ V Voltage at Mute V I(MUTE) 0~Vcc V Peak Load Current I L(PEAK) ±200 ma Load Impedance Z L ~00 Ω Differential Gain (KHz Bandwidth) G V 0~4 db Ambient Temperature T A -20~+0 C ELECTRICAL CHARACTERISTICS (V CC =V, T A =2, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DC PARAMETER V CC =3V, Mute=0.V 2. 4 ma Operating Current I C c V CC =V, Mute=0.V 3.3 ma V CC =3V, Mute=2V 00 A V CC =3V, R L =, R=K..2 V Output Voltage V OUT V CC =V, R L =, R=K 2. V V CC =2V, R L =, R=K. V Output Offset Voltage V O(OFF) V CC =V, R F =K, R L =32-30 0 30 mv Output High Level V OH 2V<V CC <V, I OUT =-ma Vcc~ V Output Low Level V OL 2V<V CC <V, I OUT =ma 0. V Bias Current I I(BIAS) -00-200 na Equivalent Resistance R EQ Pin 00 0 220 K Pin 2 40 K AC PARAMETER Open Loop Gain of Amp. Gv 0 db Open Loop Gain of Amp. 2 Gv2 f=khz, R L =32-0.3 0 0.3 db V CC =3V, R L =, THD<0% mw Output Power P OUT V CC =V, R L =32, THD<0% 20 mw Total Harmonic Distortion (f=khz) THD V CC =2V, R L =00, THD<0% 400 mw V CC =V, R L =32, P OUT =2mW 0. % V CC <3V, R L =, P OUT =20mW 0. % V CC <2V, R L =32, P OUT =200mW 0. % Gain Bandwidth Product GBW. MHz Power Supply Rejection (V CC =V, V CC =3V) PSRR C=, C2=0.0 F 0 db C=0. F, C2=0, f=khz 2 db C= F, C2= F, f=khz 2 db Muting G V(MUTE) Mute=2V, KHz<f<20KHz 0 db UNISONIC TECHNOLOGIES CO., LTD 3 of
KA02 APPLICATION CIRCUIT V CC (+.0V ~ +.0V) V CC kω Audio 0.μF 3kΩ 2 4 UTC KA02 3 4.kΩ 20kΩ Mute Vee (-.0V ~ -.0V) 0kΩ 20kΩ UNISONIC TECHNOLOGIES CO., LTD 4 of
KA02 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD of