32
Plasma TV Service Manual
14/03/2005
Each regulator option is available in either a SOT223
5, D (TPS72501 only), or DDPAK package. With
a low input voltage and properly heatsinked package, the regulator dissipates more power and
achieves higher efficiencies than similar regulators requiring 2.5 V or more minimum input voltage and
higher quiescent currents. These features make it a viable power supply solution for portable, battery
powered equipment.
Although an output capacitor is not required for stability, transient response and output noise are
improved with a 10-µF output capacitor.
Unlike some regulators that have a minimum current requirement, the TPS725 family is stable with no
output load current. The low noise capability of this family, coupled with its high current operation and
ease of power dissipation, make it ideal for telecom boards, modem banks, and other noise sensitive
applications.
12.23.2. Features
1-A Output Current
Available in 1.5-V, 1.6-V, 1.8-V, 2.5-V Fixed-Output and Adjustable Versions (1.2-V to 5.5-V)
Input Voltage Down to 1.8 V
Low 170-mV Dropout Voltage at 1 A (TPS72525)
Stable With Any Type/Value Output Capacitor
Integrated Supervisor (SVS) With 50-ms RESET Delay Time
Low 210-µA Ground Current at Full Load (TPS72525)
Less than 1-µA Standby Current
±2% Output Voltage Tolerance Over Line, Load, and Temperature (
40C to 125C)
Integrated UVLO
Thermal and Overcurrent Protection
5-Lead SOT223
5 or DDPAK and 8
Pin SOP (TPS72501 only) Surface Mount Package
12.24. TSOP1836
12.24.1. Description
The TSOP18..
series are miniaturized receivers for infrared remote control systems. PIN diode and
preamplifier are assembled on lead frame, the epoxy package is designed as IR filter. Carrier frequency
for TSOP1836 is 36kHz.
The demodulated output signal can directly be decoded by a microprocessor. The main benefit is the
reliable function even in disturbed ambient and the protection against uncontrolled output pulses.
12.24.2. Features
Photo detector and preamplifier in one package
Internal filter for PCM frequency
TTL and CMOS compatibility
Output active low
Improved shielding against electrical field disturbance
Suitable burst length .6 cycles/burst
Special Features
Small size package
Enhanced immunity against all kinds of disturbance light
Summary of Contents for HPT-4205
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Page 56: ...54 Plasma TV Service Manual 14 03 2005 15 CIRCUIT DIAGRAMS...
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