Bd6590Muv-E2 (Yd867A00) Dc-Dc Converter; Lt3506Aedhd#Trpbf (Yc714A00) Dc-Dc Converter - Yamaha PSR-S750 Service Manual

PSR-S750/PSR-S950

LT3506AEDHD#TRPBF (YC714A00) DC-DC CONVERTER

PIN
NAME
NO.
1, 8 BOOST1, BOOST2
2, 7 SW1, SW2
3, 4 V
IN1
5, 6 V
IN2
13, 12 RUN/SS1, RUN/SS2
14,11 PG1, PG2
15, 10 V , V
C1 C2
16, 9 FB1, FB2
17 Exposed Pad

BD6590MUV-E2 (YD867A00) DC-DC CONVERTER

PIN
NAME I/O
NO.
1 SW O
2 SW O
3 N.C. -
4 PGND -
5 FAILFLAG O
6 OCPSET I
7 VDET I
8 TEST I
9 RSTB I
10 ISET I
11 GND -
12 N.C. -
38
I/O
I The BOOST pins are used to provide drive voltages, higher than the input voltage, to the internal
bipolar NPN power switches. Tie through a diode from V
O The SW pins are the outputs of the internal power switches. Connect these pins to the inductors,
catch diodes and boost capacitors.
I The V pins supply current to the LT3506's internal regulator and to the internal power switch
IN1
connected to SW1. These pins must be locally bypassed.
I The V pins supply current to the internal power switch connected to SW2 and must be locally
IN2
bypassed. Connect these pins directly to V
different source.
I The RUN/SS pins are used to shut down the individual switcing regulators and the internal bias
circuits. They also provide a soft-start function. To shut down either regulator, pull the RUN/SS
pin to ground with an open drain or collector. Tie a capacitor from these pins to ground to limit
switch current during start-up. If neither feature is used, leave these pins unconnected.
O The Power Good pins are the open collector outputs of an internal comparator. PG remains low
until the FB pin is within 10% of the final regulation voltage. As well as indicating output
regulation, the PG pins can be used to sequence the two switching regulators. These pins can be
left unconnected. The PG outputs are valid when V
RUN/SS pins is high. The PG comparators are disabled in shutdown.
O The V pins are the outputs of the internal error amps. The voltages on these pins control the
C
peak switch currents. These pins are normally used to compensate the control loops, but can
also be used to override the loops. Pull these pins to ground with an open drain to shut down
each switching regulator.
I The LT3506 regulaters each feedback pin to 800mV. Connect the feedback resistor divider taps
to these pins.
- The Exposed Pad of the package provides both electrical contact to ground and good thermal
contact to the printed circuit board. The Exposed Pad must be soldered to the circuit board for
proper operation.
FUNCTION
Switching Tr drive terminal
Switching Tr drive terminal
No connect pin
PGND for switching Tr
Fail Flag
Current Limiter setting
Detect input for SBD open and OVP
TEST signal
Reset
Resister connection for LED current setting
GND for Switching Regulator
No connect pin
FUNCTION
OUT
unless power for channel 2 is coming from a
IN1
is greater than 3.4V and either of the
IN
PIN
NAME I/O
NO.
13 LED1 I Current sink for LED
14 LED2 I Current sink for LED
15 LED3 I Current sink for LED
16 LED4 I Current sink for LED
17 LED5 I Current sink for LED
18 LED6 I Current sink for LED
19 N.C. - No connect pin
20 GND - GND for Current driver
21 PWMDRV I PWM input pin for power ON/OFF only driver
22 VBAT I Regulator output / Internal power-supply
23 PWMPOW I PWM input pin for power ON/OFF
24 VBAT I Switching Tr drive terminal
DM: IC502 (PSR-S750)
or from V .
IN
DM: IC904 (PSR-S950)
FUNCTION