TB6596FLG Toshiba, TB6596FLG Datasheet - Page 8

• Manufacturer Part Number: TB6596FLG
• Manufacturer: Toshiba

Specifications of TB6596FLG

• Function: Driver
• Vopmax (vm*): 5.5V (6V)
• Io (lpeak): 0.6A (0.8A)
• Channel: 6-ch
• I/f: serial input
• Option: Const current x2
• Package: QON36
• Rohs Compatible†: yes

Linear Constant-Current Bridge: Channel F
amplifier, thus creating a negative feedback loop. This enables the constant-current drive using the low-side driver.
internal 6-bit DAC (max = 0.3 V).
*Current ramp-up rate controller:
This bridge driver circuit is tuned on and off by setting the PEMF pin High and Low, respectively.
The driver output current is converted to a voltage through the external resistor RFF and fed back to a sense
The constant-current value is adjusted by changing the Vref input to the sense amplifier, which is specified by an
To improve the dependency of a current ramp-up slope on supply voltage change at startup and its
reproducibility according to the time constant of the coil, the reference voltage for the comparator is increased
using a 5-bit DAC (in 32 steps) up to the current limit. This can stabilize the reproducibility of a current ramp-up
slope.
The current ramp-up rate is specified by dividing an external CLK. The frequency divider ratio can be selected
from 16 options (1/1 to 1/16) by using 4-bit serial data inputs.
Operating current
PWMF
External CLK
CLK divider
1/1 to 1/16
I
OUT
O1
O2
DAC
6-bit
Slope (32 steps)
Power on
32-step
counter
5-bit DAC
(32 steps)
Vref
8
OFF
ON
I
OUT
O2
Power off
RFF
V
O1
M
Current
limit
ON
OFF
V
0 V
M
TB6596FLG
2008-01-29