TL1466I Datasheet, PDF (5/24 Pages) Texas Instruments – HIGH-SPEED/PRECISION SIX CHANNEL SWITCHING REGULATOR CONTROLLER

TL1466I
HIGHĆSPEED/PRECISION SIX CHANNEL
SWITCHING REGULATOR CONTROLLER
SLVS262 − FEBRUARY 2000
Terminal Functions (Continued)
TERMINAL
NAME
MOS GATE−1
DESCRIPTION
NO.
N-Channel MOSFET gate drive for the synchronous rectification of channel 1. The ON duty cycle for this terminal
43 _{is determined by the resistor value connected to MOS DUTY (pin 24).}
MOS GATE−4
60
N-Channel MOSFET gate drive for the synchronous rectification of channel 4. The ON duty cycle for this terminal
is determined by the resistor value connected to MOS DUTY (pin 24).
NONINV INPUT−5
15
Error amplifier noninverting input terminal (channel 6). By connecting resistor and capacitor to this terminal, soft
start function is accomplished increasing this terminal voltage slowly.
NONINV INPUT−6
10
Error amplifier noninverting input terminal (channel 6). By connecting resistor and capacitor to this terminal, soft
start function is accomplished increasing this terminal voltage slowly.
OUTPUT−1
OUTPUT−2
OUTPUT−3
46 Output terminal to drive base for external PNP transistor of channel 1.
50 Output terminal to drive base for external PNP transistor of channel 2.
56 Output terminal to drive base for external PNP transistor of channel 3.
OUTPUT−4
57 Output terminal to drive base for external PNP transistor of channel 4.
OUTPUT−5
64 Output terminal to drive base for external PNP transistor of channel 5.
OUTPUT−6
4 Output terminal to drive base for external PNP transistor of channel 6.
OUTPUT BIAS−1
41 Resistor connection to set output sink current for OUTPUT−1 terminal (pin 46) of channel 1.
OUTPUT BIAS−2
47 Resistor connection to set output sink current for OUTPUT−2 terminal (pin 50) of channel 2.
OUTPUT BIAS−3
52 Resistor connection to set output sink current for OUTPUT−3 terminal (pin 56) of channel 3.
OUTPUT BIAS−4
OUTPUT BIAS−5
62 Resistor connection to set output sink current for OUTPUT−4 terminal (pin 57) of channel 4.
3 Resistor connection to set output sink current for OUTPUT−5 terminal (pin 64) of channel 5.
OUTPUT BIAS−6
7 Resistor connection to set output sink current for OUTPUT−6 terminal (pin 4) of channel 6.
OUTPUT GND−1,2,3 53 Ground for channel 1, 2, and 3 output.
OUTPUT GND−4,5,6 61 Ground for channel 4, 5, and 6 output.
OUTPUT VCC−1,3
OUTPUT VCC−2
OUTPUT VCC−4,5,6
OVP−5,6
42 Supply voltage for channel 1 and 3 outputs.
51 Supply voltage for channel 2 output.
63 Supply voltage for channel 4, 5, and 6 outputs.
8 Over-voltage threshold voltage setting for output regulation voltage of channel 5 and 6.
RT
21 Timing resistor connection for oscillation frequency setting.
SCP
Capacitor connection for short-circuit protection. When voltage across COMP terminal for each channel is
23
dropped below the specified threshold voltage, the capacitor connected between SCP and GND is charged by
the constant current source (2.5 µA Typ). If the voltage reaches to 1.5 V, the timer latch circuitry is set and all
channel outputs are forced to turn off.
SOFT START
STANDBY
Soft start operation for channel 1 to 4. By connecting a capacitor between this terminal connected internally to
26
error amplifier noninverting input for channel 1 to 4 and GND, soft start operation is enabled charging a capacitor
with the constant current source (3 µA Typ). Moreover, the same soft start operation is also enabled at the
standby release using STANDBY−3 terminal only for channel 3.
30
ON/OFF common control input for all channels. The all channels output is turned off by adding low-level input
voltage (0.4 V Max) to this terminal, and the reference voltage is also shutdown.
STANDBY−3
29
ON/OFF control input for channel 3. The channel 3 output is turned off by adding low-level input voltage (0.4
V Max) to this terminal.
VCC
VREF
28 Supply voltage
27 1.5 V reference voltage output
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