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STA505A
General Purpose Sink Driver Array
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STA505ANovember 2004
FEATURES MULTIPOWER BCD TECHNOLOGY MINIMUM INPUT OUTPUT PULSE WIDTH
DISTORTION 200mΩ RdsON COMPLEMENTARY DMOS
OUTPUT STAGE CMOS COMPATIBLE LOGIC INPUTS THERMAL PROTECTION THERMAL WARNING OUTPUT UNDER VOLTAGE PROTECTION SHORT CIRCUIT PROTECTION
DESCRIPTIONSTA505A is a monolithic quad half bridge stage in
Multipower BCD Technology. The device can be
used as dual bridge or reconfigured, by connecting
CONFIG pin to Vdd pin, as single bridge with double
current capability, and as half bridge (Binary mode)
with half current capability.
The device is particularly designed to make the out-
put stage of a stereo All-Digital High Efficiency
(DDX™) amplifier capable to deliver 50 + 50W @
THD = 10% at Vcc 30V output power on 8Ω load and
80W @ THD = 10% at Vcc 36V on 8Ω load in single
BTL configuration. The input pins have threshold pro-
portional to VL pin voltage.
PRODUCT PREVIEW45V 3.5A QUAD POWER HALF BRIDGE
Figure 2. AUDIO APPLICATION CIRCUIT (Dual BTL) Pin Description REV. 2
STA505A
Table 2. PIN FUNCTION
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STA505A
Table 3. FUNCTIONAL PIN STATUS(*) : The pin is open collector. To have the high logic value, it needs to be pulled up by a resistor.
(**): To put CONFIG = 1 means connect Pin 24 (CONFIG) to Pins 21, 22 (Vdd)
Figure 3. PIN CONNECTION
STA505A
Table 4. ABSOLUTE MAXIMUM RATINGS
Table 5. THERMAL DATA
Table 6. ELECTRICAL CHARACTERISTCS (VL = 3.3V; Vcc = 30V; Tamb = 25°C; fsw = 384KHz; unless
otherwise specified)
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STA505A
Table 7. Notes:1. The following table explains the VLow, VHigh variation with VL
Note 2: See relevant Application Note AN1994
Table 8. LOGIC TRUTH TABLE (see fig. 5)
STA505A
Figure 4. Test Circuit.
Figure 5.
Figure 6.
