TPS54200_17 Datasheet, PDF (5/38 Pages) Texas Instruments – 4.5-V to 28-V Input Voltage, 1.5-A Output Current, Synchronous Buck WLED Driver

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TPS54200, TPS54201
SLUSCO8A – NOVEMBER 2016 – REVISED MARCH 2017
6.5 Electrical Characteristics
The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These
specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of
the product containing it. T_J = –40°C to +125°C, V_IN = 4.5 V to 28 V, (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
INPUT SUPPLY
V_IN
I_OFF
V_{IN_UVLO}
Input voltage range
Shut down current
VIN under voltage lockout
Hysteresis
PWM = GND
Rising V_IN
Falling V_IN
4.5
28 V
2 8.6 µA
3.83 4.2 4.47 V
3.4 3.7 3.95 V
470
mV
DIMMING (PWM PIN)
V_ADIM
Analog dimming mode threshold
Rising
Falling
1.97 2.07 2.17 V
1.8
V
V_PDIM
PWM dimming mode threshold
Rising
Falling
0.9 1.0 1.1 V
0.8
V
V_PWM
Threshold to identify PWM duty cycle
Rising
Falling
0.91 1.0 1.12 V
0.5 0.63 0.72 V
V_{PWM_SHUTDOWN} Shutdown threshold
FEEDBACK AND ERROR AMPLIFIER
0.35 0.55
V
V_FB1
Feedback voltage in analog dimming
mode
PWM = 3.3 V, SW duty > 90%
201 205 210 mV
V_FB2
BOOT PIN
Feedback voltage in PWM dimming mode PWM = 1.5 V, SW duty > 90%
96 100 104 mV
V_{BOOT_UVLO}
BOOT-SW UVLO threshold
Rising
Falling
2.1 2.33 V
2 2.2 V
POWER STAGE
R_HSD
R_LSD
CURRENT LIMIT
High-side FET on resistance
Low-side FET on resistance
V_BOOT – SW = 6 V
V_IN > 6 V
150 259 mΩ
70 120 mΩ
I_{LIM_HS1}
High side current limit 1
Either one of below conditions:
1. PWM dim mode
2.4
2. Analog dim mode and PWM duty >25%
3 3.6 A
I_{LIM_HS2}
High side current limit 2
I_{LIM_LS_SOURCE}
Low side source current limit
I_{LIM_LS_SINK}
Low side sink current limit
FAULT PROTECTION
Analog dim mode and PWM duty <25%
V_IN > 6 V
V_IN > 6 V
1 1.4 1.8 A
2.3 3.3 4.4 A
1.25 1.7 2.2 A
Thermal
shutdown ⁽¹⁾
Rising temperature
Hysteresis
150 160 170 °C
10
°C
V_OVP
V_OCP
Over voltage protection
Over current protection
1
V
120%
(1) Not production tested
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