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SM645, SM645/HRK, SM6451AV

Table of contents:
Info of SM645
Info of SM645/HRK
Info of SM6451AV

SM645, SM645/HRK, SM6451AV Selling Leads, Datasheet

MFG:SG Package Cooled:TO-3 D/C:08+

SM645, SM645/HRK, SM6451AV Datasheet download

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Part Number: SM645

MFG: SG

Package Cooled: TO-3

D/C: 08+

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SM645 General Description

The SM645/646/647 series of Power Output Stages are especially designed to be driven with standard PWM integrated circuits to form an efficient switching power supply. The SM645, SM646 and SM647 are optimized for non-isolated Buck and Buck-Boost application. The hybrid circuit construction utilizes thick film resistors on a beryllia substrate for maximum thermal conductivity and resultant low thermal impedance. All of the active elements in the hybrid are fully passivated.

SM645 Maximum Ratings

                                                                    SM645 SM646 SM647
Input Voltage, V_{4 - 2} ......................................... 60V 80V 100V
Output Voltage, V_{1 - 2}...................................... 60v 80v 100V
Drive Input Reverse Voltage, V_{3 - 4} ................     5V   5V     5V
Continuous Output Current, I₁ .......................    15A 15A  15A
Peak Output Current .....................................     20A 20A 20A
Drive Current, I₃......................................... -0.4A -0.4A -0.4A
Thermal Resistance
Power Switch, qJ - C ...................................................2.0/W
Commutating Diode ....................................................2.0/W
Case to Ambient, qC - A ............................................30.0/W
Operating Junction Temperature
Hermetic (K Package) .....................................................150
Storage Temperature Range ............................ .-65 to 150
Lead Temperature (Soldering, 10 Seconds) ......................300

SM645 Features

· Equivalent to the Unitrode PIC 645, 646, 647
· 15A current capability
· Cost saving design reduces size, improves efficiency, reduces noise and RFI
· High operating frequency (to > 100KHz) results in smaller inductor-capacitor filter and improved power supply response time
· High operating efficiency at 7A typical performance - Rise and fall time < 300ns Efficiency > 85%

SM6451AV General Description

The SM6451AV is a 3-wire serial-controlled electronic variable volume IC for audio applications. It provides electronic volume control for a stereo system (left and right channels), and independent channel attenuation and muting, with greatly enhanced digital zip noise suppression. The chip address function allows up to four SM6451AV devices to be connected and individually controlled over the 3-wire control interface from a single CPU. It is available in 16-pin VSOP packages.

SM6451AV Maximum Ratings

Parameter	Symbol	Rating	Unit
Supply voltage	V_DD	-0.3 to 7.0	V
Input voltage	V_IN	V_SS - 0.3 to V_DD+ 0.3	V
Power dissipation	P_D	150	mW
Storage temperature	T_stg	-55 to 125
Soldering temperature	T_sld	225
Soldering time	t_sld	10	s

SM6451AV Features

` Stereo inputs and outputs
` Attenuation function
    • 2-channel independent control
    • 1.0 dB/step over 80 steps
    • 0 to-80 dB range
` Mute function
` 3-wire serial data control (MDT, MCK, MLEN)
` Chip addressing (up to 4 devices can be connected in parallel)
` Low noise
    •0.002% THD + noise
    • 10 Vrms residual noise
` 5 V single power supply
` Silicon-gate CMOS process

SM6451AV Typical Application

· Audio equipment

SM6451AV Connection Diagram

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