G1421

Supply Voltage, V_DD...................6V
Input Voltage, V_I...........-0.3V to VDD+0.3V
Operating Ambient Temperature Range
T_A...................... .-40 to +85
Maximum Junction Temperature, T_J..... ...150
Storage Temperature Range, TSTG...-65 to+150
Reflow Temperature (soldering, 10sec)......260
Power Dissipation (1)
T_A 25..........................2.7W
T_A 70.........................1.7W
T_A 85.........................1.4W
Electrostatic Discharge, V_ESD
Human body mode
Lout- pin...................-8000 to 8000V
Other pins.................-3000 to 3000<sup>(2)

Note:
(1) : Recommended PCB Layout.
(2) : Human body model : C = 100pF, R = 1500, 3 positive pulses plus 3 negative pulses</sup>

G1421 is a stereo audio power amplifier in 24pin TSSOP thermal pad package. It can drive 1.8W continuous RMS power into 4 load per channel in Bridge-Tied Load (BTL) mode at 5V supply voltage. Its THD is smaller than 1% under the above operation condition. To simplify the audio system design in the notebook application, G1421 supports the Bridge-Tied Load (BTL) mode for driving the speakers, Single-End (SE) mode for driving the headphone. In the HP-IN mode, it can support a DC value to the phone-jacket and drive the headphone without the audio amplifier outputs coupling capacitors. G1421 can mute the output when Mute-In is activated. For the low current consumption applications, the SHDN mode is supported to disable G1421 when it is idle. The current consumption can be further reduced to below 5A.

G1421 also supports two input paths, that means two different gain loops can be set in the same PCB and choosing either one by setting HP/ LINE pin. It enhances the hardware designing flexibility. G1421 also supports an extra function -- the maximum output power clamping function to protect the speakers or headphones from burned-out.