LA6568 Sanyo Semiconductor Corporation, LA6568 Datasheet
LA6568
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LA6568 Summary of contents
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... Ordering number : ENN7740 LA6568 Overview The LA6568 is a six-channel driver for optical disc drives that includes built-in 3.3 V and 5 V regulators. Functions • Six power amplifier channels • I max: 700 mA O • Built-in level shifter circuits (for the BTL amplifiers) • Muting circuit (output on/off control) for one channel • ...
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... Note ∗1: The combined current drain for P-V CC ∗2: The voltage difference across the load (8Ω) terminals. With the outputs in the saturated state. ∗3: Design target value. Parameters are not tested. ∗4: When IN- MUTE is high: output on, when IN- MUTE is low: output off (high-impedance state) LA6568 = P–V CC Symbol Conditions All outputs on ∗ ...
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... Input Inputs Output Outputs 1− 2− 4− 5− 3− 6− IN- MUTE Mute Controls the on/off state of the outputs. IN- MUTE high: outputs on IN- MUTE low: outputs off LA6568 Pin description V IN Vref V CC IN-MUTE S-GND Equivalent circuit OUT Continued on next page. No.7740-3/8 ...
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... Continued from preceding page. Pin No. Symbol Pin name 11 O- RESET Reset Open-collector output 3 − Input Inputs (Loading IN block) 6 − 5VREG 5VREG 5 V regulator output 22 3.3VREG 3.3VREG 3.3 V regulator output LA6568 Pin description Equivalent circuit 50kΩ No.7740-4/8 ...
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... Signal system ground VREF Reference voltage 9 IN- MUTE 10 MUTE The reset output goes low when VREF is under 0.7 V. RESET O- RESET 11 22 kΩ kΩ kΩ ×3 ×3 LA6568 22 kΩ 22 kΩ - Overheat protection circuit (Thermal shutdown) × × Power system ground 24 P-GND2 + - ...
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... Sample Application Circuit 1 LOADING M MOTOR 2 3 FOCUS COIL 4 5 TRACKING COIL MUTE RESET 12 CHANGER REV LOADING REV 15 LA6568 P-GND2 24 P-GND1 S-GND P 3.3VREG 22 VREF IN-MUTE 21 S O-RESET 5VREG CHANGER M MOTOR SPINDLE M MOTOR SLED M MOTOR V CC 3.3 V SLED MOTOR SPINDLE MOTOR FOCUS COIL ...
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... Note ∗ 1: FWD REV − Note: • In brake mode, the + and - output voltages both • The "L" voltage level is any level less than VF (approximately 0.6 V). • The loading circuit (channels 3 and 6) gain is 3.5 dB (typical). LA6568 Power Supply CC P-V CC CH1 (BTL-AMP) OFF OFF OFF BTL-AMP 3 ...
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... SANYO Semiconductor believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of August, 2004. Specifications and information herein are subject to change without notice. LA6568 O- RESET ...