TB6559FG Toshiba, TB6559FG Datasheet - Page 11

• Manufacturer Part Number: TB6559FG
• Manufacturer: Toshiba

Specifications of TB6559FG

• Functions: Driver
• Vopmax (vm*): 30V (50V)
• Io (lpeak): 1A (2.5A)
• Channel: 1-ch
• Pwm Drive: direct PWM & constant current PWM
• Package: HSOP16
• Rohs Compatible†: yes

V
GND Section
ALERT Circuit
Thermal Shutdown (TSD) Circuit
CC
•
•
•
•
•
160°C (typ.), the output transistors are turned off.
threshold, which is lowered by a hysteresis of 40°C.
Normal operation: Low
Protective operation: High
The TB6559FG incorporates a thermal shutdown circuit. When the junction temperature (T
The output transistors are automatically turned on when the junction temperature cools past the shutdown
The IC has 40°C of temperature hysteresis.
Power Supply
V
The operating voltage range is:
IN1, IN2, and SB should be set Low at power-on. (In direct PWM mode, OSC/PWM should also be set
Low.)
The TB6559FG has two separate grounds: S-GND for the control circuitry and P-GND for the output
circuitry. S-GND and P-GND should be short-circuited at a location as close to the TB6559FG as possible.
When either the thermal shutdown or overcurrent protection circuit is activated, the ALERT output goes
High (CMOS output). When the ALERT pin is changed from low to high or vice versa, its output signal
may become unstable, causing chattering or noise pulses. To avoid such instability, it is recommended to
insert an RC filter to the output line.
T
ΔT
CC
SD
V
SD
supplies a voltage to the output circuit and the internal 5-V circuit.
CC (opr.)
<Thermal Shutdown>
= 160°C (target spec)
= 40°C (target spec)
Chip temperature
= 10 to 30 V
ALERT output
160°C (typ.)
120°C (typ.)
H
L
11
TSD
TB6559FG
j
2009-04-14
) exceeds