TB62771FTG Datasheet, PDF (8/29 Pages) Toshiba Semiconductor – Step-up DC/DC controller built in 4-channel sink driver for white LED

TB62771FTG
Electrical Characteristics
(Unless otherwise specified, V_IN = V_EN = 12V, R_SETI = 15kΩ, C_VCC = 1μF, V_CC = V_DRV,
NDRV = COMP = OUT = Open, V_RSDT = V_DIM = V_CC, V_OVP = V_CS =V_PGND1 = V_PGND2 = V_AGND
= 0V, Ta = -40 to 85°C, Typical values are at Ta = 25°C condition)
VCC REGULATOR
Characteristics
Symbol
Condition
Min Typ. Max Unit
VCC output voltage
VCC drop voltage
V_CC
VCC_DROP
6.5V < VIN < 10V, 1mA < ILOAD <
50mA
10V < VIN < 40V, 1mA < ILOAD <
4.75
5.0
5.25
V
10mA
VIN - VCC, VIN = 4.75V, ILOAD =
50mA
-
200 500 mV
VCC current limit
VCC under lock out voltage
ICC_LIMIT VCC connects to AGND
UVLO_VCC VCC rising
- 100 - mA
-
4
-
V
VCC under lock out voltage
hysteresis
UVLO_VCC_HYS
-
- 100 - mV
RT OSCILLATOR
Characteristics
Symbol
Condition
Switching frequency
Maximum duty cycle
Frequency accuracy (Note3)
Synchronized signal threshold
voltage
f_SW
Dmax
-
-
f_SW = 200kHz to 600kHz
f_SW = 600kHz to 2000kHz
f_SW = 200kHz to 2000kHz
-
-
Minimum synchronized
frequency
-
-
Note3: Relative accuracy to typical characteristic.
PWM COMPARATOR
Characteristics
Symbol
PWM comparator
Leading-edge blanking time
-
(Note4)
PWM-NDRV propagation delay
(Note4)
-
Condition
-
-
Min Typ. Max Unit
200 - 2000 kHz
90 94 98
%
86 90 94
-7
-
7
%
4
-
-
V
1.1f_SW -
- Hz
Min Typ. Max Unit
-
60
- ns
-
90
- ns
SLOPE COMPENSATION
Characteristics
Peak slope compensation
current
Symbol
Condition
- Peak slope for CS input
Note4: This specification is design guarantee, not production tested.
Min Typ. Max Unit
45 50 55 µA･fsw
8
2013-05-23